Q.170 Zoology ⭐ 360° Option Elimination Active

NEET 2024 Zoology Question 170 Solution

Topic: Human Reproduction · Official NTA Booklet Code T1

Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby. Reason R: Colostrum contains several antibodies absolutely essential to develop resistance for the new born baby. In the light of the above statements, choose the most appropriate answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (3) : Both A and R are correct and R is the correct explanation of A.

📚 Human Reproduction Easy

📋 Given Parameters & Problem Setup

Assertion A Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby.

Reason R Colostrum contains several antibodies absolutely essential to develop resistance for the new born baby.

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The 30-Second Exam Hall Shortcut: ⚡ Colostrum and Passive Immunity Link

⏱️ Save ~20 seconds

Colostrum secreted during initial days of lactation is rich in IgA antibodies, conferring essential passive immunity to the infant. Both statements are true and Reason R perfectly explains Assertion A!

1 Assertion A: Doctors universally recommend breast-feeding during initial months for newborn health -> TRUE.

2 Reason R: The yellowish milk (colostrum) contains abundant secretory IgA antibodies essential to provide passive immunity and resistance to infections -> TRUE.

3 Does R explain A? Yes, the presence of protective maternal antibodies in colostrum is precisely why doctors recommend breast-feeding.

4 Select Option (3) / C.

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Why You Can 100% Trust This Shortcut: NCERT Biology · Human Reproduction (Parturition and Lactation)

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Evaluate Assertion A (Pediatric Recommendation)

The mammary glands of the female undergo differentiation during pregnancy and start producing milk towards the end of pregnancy by the process called lactation. Breast-feeding during the initial period of infant growth is strongly recommended by physicians for bringing up a healthy baby. Assertion A is true.

Step 2

Evaluate Reason R (Immunological Basis of Colostrum)

The milk produced during the initial few days of lactation is called colostrum. It contains several antibodies (particularly secretory $IgA$ ) absolutely essential to develop passive immunity and systemic resistance in the newborn baby whose immune system is still immature. Reason R is true.

Step 3

Establish Causal Explanation

The protective immunological defense conferred by colostrum antibodies is the exact physiological rationale why breast-feeding is recommended. Thus, Reason R is the correct explanation of Assertion A.

⭐

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:

Reason R is factually correct and scientifically validated.

⚠️

Student Fallacy (Why candidates pick this trap): Reason R is factually correct and scientifically validated.

2 (2)

✗ Incorrect

Verdict & Scientific Reason:

Assertion A is correct.

⚠️

Student Fallacy (Why candidates pick this trap): Assertion A is correct.

3 (3)

✓ 100% Correct

Verdict & Scientific Reason:

Both statements are true and Reason R provides the exact immunological justification for Assertion A.

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Why this is airtight: None.

4 (4)

✗ Incorrect

Verdict & Scientific Reason:

Reason R directly and causally explains Assertion A.

⚠️

Student Fallacy (Why candidates pick this trap): Reason R directly and causally explains Assertion A.

⚠️

NTA Trap Alert: IgA vs IgG Confusion

Confusing antibodies crossing placenta (IgG) with antibodies present in colostrum (IgA).

🛡️ How to avoid the -1 mark: Remember: IgG crosses placenta; IgA is secreted in colostrum/milk.

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Core NEET Syllabus Standard

Biology Core Zoology · Human Reproduction Standard Benchmark

Core Scientific Principle Tested:

"The milk produced during the initial few days of lactation is called colostrum which contains several antibodies absolutely essential to develop resistance for the new-born baby. Breast-feeding during the initial period of infant growth is recommended by doctors for bringing up a healthy baby."

Syllabus Focus: Colostrum Antibodies (IgA) and Infant Immune Protection

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2024 Zoology Question 170 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Colostrum and Passive Immunity Link

Step-by-Step Rigorous Workflow & Mathematical Proof

Evaluate Assertion A (Pediatric Recommendation)

Evaluate Reason R (Immunological Basis of Colostrum)

Establish Causal Explanation

360° Option Elimination Engine Key Feature

NTA Trap Alert: IgA vs IgG Confusion

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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