Q.196 Zoology ⭐ 360° Option Elimination Active

NEET 2021 Zoology Question 196 Solution

Topic: Human Health and Disease · Official NTA Booklet Code M1

Question

Match List - I with List - II. (a) Filariasis (i) Haemophilus influenzae (b) Amoebiasis (ii) Trichophyton (c) Pneumonia (iii) Wuchereria bancrofti (d) Ringworm (iv) Entamoeba histolytica List - I List - II Choose the correct answer from the options given below. (a) (b) (c) (d)

(1)(iv) (i) (iii) (ii)
(2)(iii) (iv) (i) (ii)
(3)(i) (ii) (iv) (iii)
(4)(ii) (iii) (i) (iv)

✓

Verified Against NTA Final Answer Key

Option (2) : (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

📚 Human Health and Disease Easy

📋 Given Parameters & Problem Setup

List I (Diseases) (a) Filariasis, (b) Amoebiasis, (c) Pneumonia, (d) Ringworm

List II (Pathogens) (i) Haemophilus influenzae, (ii) Trichophyton, (iii) Wuchereria bancrofti, (iv) Entamoeba histolytica

⚡

The 30-Second Exam Hall Shortcut: ⚡ "Wuchereria = Filariasis, Entamoeba = Amoebiasis, Haemophilus = Pneumonia"

⏱️ Save ~25 seconds

Filariasis is caused by the filarial nematode Wuchereria bancrofti ((a)-(iii)); Amoebiasis is caused by the protozoan Entamoeba histolytica ((b)-(iv)); Pneumonia is caused by Haemophilus influenzae ((c)-(i)); and Ringworm is caused by the fungus Trichophyton ((d)-(ii)). Looking at options, only Option (2) matches!

1 Match (a) Filariasis -> (iii) Wuchereria bancrofti (filarial worm).

2 Match (b) Amoebiasis -> (iv) Entamoeba histolytica (intestinal amoebic parasite).

3 Match (c) Pneumonia -> (i) Haemophilus influenzae (bacterial pneumonia pathogen).

4 Match (d) Ringworm -> (ii) Trichophyton (dermatophyte fungus).

5 Match pattern (iii), (iv), (i), (ii) -> Option (2).

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Human Health and Disease (Common Infectious Diseases in Humans: Pneumonia is caused by Streptococcus pneumoniae and Haemophilus influenzae; Amoebiasis is caused by Entamoeba histolytica; Filariasis by Wuchereria bancrofti; Ringworm by Microsporum, Trichophyton and Epidermophyton).

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Etiology and Biological Classification of Listed Human Pathogens

- (a) Filariasis (Elephantiasis): Caused by the filarial roundworm nematodes _Wuchereria bancrofti_ and _Wuchereria malayi_. The adult worms lodge in the lymphatic vessels of the lower limbs and genital organs, triggering chronic inflammation and gross lymphedema. - (b) Amoebiasis (Amoebic Dysentery): Caused by the protozoan parasite _Entamoeba histolytica_ in the large intestine of humans. Symptoms include constipation, abdominal cramps, and stools with excess mucus and blood clots. - (c) Pneumonia: A bacterial pulmonary infection caused by _Streptococcus pneumoniae_ and _Haemophilus influenzae_, which infects the alveoli of the lungs, causing them to fill with fluid. - (d) Ringworm: A superficial cutaneous fungal infection caused by dermatophyte fungi of the genera _Microsporum_, _Trichophyton_, and _Epidermophyton_, characterized by dry, scaly pruritic lesions on skin, scalp, and nails.

\begin{aligned} \text{Filariasis} &\iff \textit{Wuchereria bancrofti} \quad [\text{(a)} \to \text{(iii)}] \\ \text{Amoebiasis} &\iff \textit{Entamoeba histolytica} \quad [\text{(b)} \to \text{(iv)}] \\ \text{Pneumonia} &\iff \textit{Haemophilus influenzae} \quad [\text{(c)} \to \text{(i)}] \\ \text{Ringworm} &\iff \textit{Trichophyton} \quad [\text{(d)} \to \text{(ii)}] \end{aligned}

Step 2

Option Alignment

Matching sequence is: (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii). This corresponds precisely to Option (2).

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 1

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Links Filariasis to Entamoeba histolytica and Amoebiasis to Haemophilus.

⚠️

Student Fallacy (Why candidates pick this trap): Gross misalignment of nematode and protozoan pathogens.

2 2

✓ 100% Correct

Verdict & Scientific Reason:

Correct. Accurately links all four diseases to their canonical causative agents.

💡

Why this is airtight: None. Candidate recognizes textbook infectious diseases.

3 3

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns Haemophilus to Filariasis and Trichophyton to Amoebiasis.

⚠️

Student Fallacy (Why candidates pick this trap): Reading list entries without matching pathogen biology.

4 4

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Links ringworm fungus Trichophyton to filariasis.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing fungal skin infections with parasitic filarial worms.

⚠️

NTA Trap Alert: Haemophilus influenzae "Flu" Misnomer Trap

Because the species name is "influenzae", many students assume Haemophilus causes the viral flu (influenza) and fail to associate it with bacterial pneumonia. NCERT explicitly names Haemophilus influenzae as a causative agent of pneumonia.

🛡️ How to avoid the -1 mark: Remember: Bacterial Pneumonia = Streptococcus pneumoniae + Haemophilus influenzae.

📖

Core NEET Syllabus Standard

NEET / NCERT Biology · Human Health and Disease Standard Benchmark

Core Scientific Principle Tested:

"Filariasis is caused by Wuchereria bancrofti; amoebiasis by Entamoeba histolytica; pneumonia by Haemophilus influenzae; ringworm by Trichophyton."

Syllabus Focus: Common Diseases in Humans

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2021 Zoology Question 196 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ "Wuchereria = Filariasis, Entamoeba = Amoebiasis, Haemophilus = Pneumonia"

Step-by-Step Rigorous Workflow & Mathematical Proof

Etiology and Biological Classification of Listed Human Pathogens

Option Alignment

360° Option Elimination Engine Key Feature

NTA Trap Alert: Haemophilus influenzae "Flu" Misnomer Trap

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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