Q.69 Chemistry ⭐ 360° Option Elimination Active

NEET 2025 Chemistry Question 69 Solution

Topic: Biomolecules · Official NTA Booklet Code 45

Question

Match List I (Name of Vitamin) with List II (Deficiency disease). List I: A. Vitamin B₁₂; B. Vitamin D; C. Vitamin B₂; D. Vitamin B₆. List II: I. Cheilosis; II. Convulsions; III. Rickets; IV. Pernicious anaemia. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (2) : A-IV, B-III, C-I, D-II

📚 Biomolecules Easy

📋 Given Parameters & Problem Setup

List I (Vitamins) A. Vitamin B₁₂, B. Vitamin D, C. Vitamin B₂, D. Vitamin B₆

List II (Deficiency Diseases) I. Cheilosis, II. Convulsions, III. Rickets, IV. Pernicious anaemia

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The 30-Second Exam Hall Shortcut: ⚡ Vitamin Deficiency Canonical Pairings

⏱️ Save ~30 seconds

Vitamin B₁₂ = Pernicious Anaemia (A-IV). Vitamin D = Rickets (B-III). Vitamin B₂ (Riboflavin) = Cheilosis (C-I). Vitamin B₆ (Pyridoxine) = Convulsions (D-II)!

1 Recall Vitamin B₁₂: Essential for RBC maturation; deficiency causes Pernicious anaemia ⟹ A matches IV.

2 Recall Vitamin D: Required for bone mineralization; deficiency causes Rickets in children ⟹ B matches III.

3 Looking at options: Only Option (2) and (4) feature A-IV, B-III.

4 Recall Vitamin B₂ (Riboflavin): Deficiency causes fissures at lip corners called Cheilosis ⟹ C matches I.

5 Recall Vitamin B₆ (Pyridoxine): Deficiency causes Convulsions ⟹ D matches II.

6 Match: A-IV, B-III, C-I, D-II.

7 Select Option (2) in under 10 seconds!

🛡️

Why You Can 100% Trust This Shortcut: Classification of Vitamins & Deficiency Disorders (NCERT Chemistry · Biomolecules).

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Match Vitamin B₁₂ and Vitamin D

Examine the biochemical roles and clinical deficiency symptoms from NCERT Table 14.1:

\text{Vitamin B}_{12} \text{ (Cyanocobalamin)} \implies \text{Pernicious anaemia (IV)}

• A matches IV (A-IV).
• Vitamin D (Calciferol): Regulates calcium and phosphate absorption. Deficiency leads to bone softening and malformation in children known as Rickets (III).
• B matches III (B-III).

Step 2

Match Vitamin B₂ and Vitamin B₆

Examine water-soluble B-complex vitamins:

\text{Vitamin B}_2 \text{ (Riboflavin)} \implies \text{Cheilosis (fissuring of lips, I)}

• C matches I (C-I).
• Vitamin B₆ (Pyridoxine): Involved in amino acid metabolism and neurotransmitter synthesis. Severe deficiency manifests clinically as Convulsions (II).
• D matches II (D-II).

Step 3

Synthesize the Complete Match

Combine the individual pairings:

\text{A-IV, B-III, C-I, D-II} \implies \text{Option (2)}

• Matches Option (2) exactly.

⭐

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

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns cheilosis to B₁₂ and pernicious anaemia to B₆.

⚠️

Student Fallacy (Why candidates pick this trap): Scrambling B-complex vitamins.

2 B

✓ 100% Correct

Verdict & Scientific Reason:

100% correct. B₁₂ (Pernicious anaemia), D (Rickets), B₂ (Cheilosis), B₆ (Convulsions).

💡

Why this is airtight: None; verbatim NCERT Table 14.1 recall.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns convulsions to B₁₂.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing neurological manifestations of B₁₂ with B₆.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Swaps B₂ and B₆ deficiencies (convulsions and cheilosis).

⚠️

Student Fallacy (Why candidates pick this trap): Swapping B₂ and B₆.

⚠️

NTA Trap Alert: Swapping Vitamin B₂ (Cheilosis) and B₆ (Convulsions)

Option 4 has A-IV and B-III correct, but swaps C and D (assigning convulsions to B₂ and cheilosis to B₆). Remembering that B₂ (Riboflavin) causes cheilosis prevents falling into this distractor!

🛡️ How to avoid the -1 mark: Mnemonic: B2 = Cheilosis (2 lips); B6 = Convulsions!

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Core NEET Syllabus Standard

NEET Chemistry Core Syllabus · Biomolecules Standard Benchmark

Core Scientific Principle Tested:

"B₁₂ deficiency causes pernicious anaemia; D causes rickets; B₂ causes cheilosis; B₆ causes convulsions."

Syllabus Focus: Vitamins: Classification and Deficiency Diseases

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

B12 = Anaemia, D = Rickets, B2 = Cheilosis (Lips), B6 = Convulsions ⟹ Option (2)!

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NEET 2025 Chemistry Question 69 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Vitamin Deficiency Canonical Pairings

Step-by-Step Rigorous Workflow & Mathematical Proof

Match Vitamin B₁₂ and Vitamin D

Match Vitamin B₂ and Vitamin B₆

Synthesize the Complete Match

360° Option Elimination Engine Key Feature

NTA Trap Alert: Swapping Vitamin B₂ (Cheilosis) and B₆ (Convulsions)

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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