Q.76 Zoology ⭐ 360° Option Elimination Active

NEET 2020 Zoology Question 76 Solution

Topic: Body Fluids and Circulation · Official NTA Booklet Code E1

Question

Match the following columns and select the correct option. Column - I Column - II (a) Eosinophils (i) Immune response (b) Basophils (ii) Phagocytosis (c) Neutrophils (iii) Release histaminase, destructive enzymes (d) Lymphocytes (iv) Release granules containing histamine (a) (b) (c) (d)

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

✓

Verified Against NTA Final Answer Key

Option (1) : (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

📚 Body Fluids and Circulation Easy

📋 Given Parameters & Problem Setup

Column I (Leukocytes) (a) Eosinophils, (b) Basophils, (c) Neutrophils, (d) Lymphocytes

Column II (Functions) (i) Immune response, (ii) Phagocytosis, (iii) Release histaminase, destructive enzymes, (iv) Release granules containing histamine

⚡

The 30-Second Exam Hall Shortcut: ⚡ "Neutro = Phagocyte; Baso = Histamine; Eosino = Histaminase; Lympho = Immune!"

⏱️ 25 seconds

Neutrophils are phagocytic cells (c->ii). Basophils secrete histamine, serotonin, heparin (b->iv). Eosinophils resist infections and release histaminase/destructive enzymes (a->iii). Lymphocytes (B and T) mediate immune responses (d->i). Combination is (iii), (iv), (ii), (i) -> Option 1 in 10 seconds!

1 Neutrophils and monocytes are phagocytic cells destroying foreign organisms -> (c)-(ii).

2 Basophils secrete histamine, serotonin, heparin in inflammatory reactions -> (b)-(iv).

3 Eosinophils resist infections, associated with allergic reactions, and release histaminase -> (a)-(iii).

4 Lymphocytes (B and T forms) are responsible for adaptive immune responses -> (d)-(i).

5 Mapping: (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) -> Option 1.

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Human Physiology: Body Fluids and Circulation (Formed Elements: Leukocytes)

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Match Eosinophils

Eosinophils (2-3% of total WBCs) resist infections and are associated with allergic reactions; they contain granules releasing histaminase and destructive enzymes to combat parasitic infections. Thus, (a) matches (iii).

Step 2

Match Basophils

Basophils (0.5-1% of total WBCs) secrete histamine, serotonin, and heparin, and are involved in inflammatory reactions. Thus, (b) matches (iv).

Step 3

Match Neutrophils

Neutrophils (60-65% of total WBCs) are the most abundant phagocytic cells that engulf and destroy foreign microbes entering the body. Thus, (c) matches (ii).

Step 4

Match Lymphocytes

Lymphocytes (20-25% of total WBCs) occur in two major types—B and T cells—both of which are responsible for the immune responses of the body (humoral and cell-mediated immunity). Thus, (d) matches (i).

⭐

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 A

✓ 100% Correct

Verdict & Scientific Reason:

Accurate pairing across all four white blood cell varieties and their distinct functions.

💡

Why this is airtight: None; core hematology curriculum.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect; confuses eosinophils with histamine releasers and basophils with immune response.

⚠️

Student Fallacy (Why candidates pick this trap): Swapping basophil and eosinophil functions.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect; assigns immune response to eosinophils and phagocytosis to basophils.

⚠️

Student Fallacy (Why candidates pick this trap): Mispairing primary leukocyte roles.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect; inverts neutrophil phagocytosis with eosinophil enzymatic release.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing granulocyte subsets.

⚠️

NTA Trap Alert: Basophil (Histamine) vs Eosinophil (Histaminase)

Basophils SECRETE Histamine (promoting inflammation). Eosinophils SECRETE Histaminase (destroying/breaking down histamine to moderate allergic reactions).

🛡️ How to avoid the -1 mark: Look at the suffix: Basophil releases Histam-INE; Eosinophil releases Histamin-ASE (the enzyme)!

📖

Core NEET Syllabus Standard

Zoology · Body Fluids and Circulation Standard Benchmark

Core Scientific Principle Tested:

Syllabus Focus: Leukocyte Types and Functions: Eosinophils, Basophils, Neutrophils & Lymphocytes

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2020 Zoology Question 76 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ "Neutro = Phagocyte; Baso = Histamine; Eosino = Histaminase; Lympho = Immune!"

Step-by-Step Rigorous Workflow & Mathematical Proof

Match Eosinophils

Match Basophils

Match Neutrophils

Match Lymphocytes

360° Option Elimination Engine Key Feature

NTA Trap Alert: Basophil (Histamine) vs Eosinophil (Histaminase)

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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