Q.191 Zoology ⭐ 360° Option Elimination Active

NEET 2024 Zoology Question 191 Solution

Topic: Human Health and Disease · Official NTA Booklet Code T1

Question

Given below are two statements: Statement I: Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Statement II: Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes. In the light of the above statements, choose the most appropriate answer from the options given below:

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Verified Against NTA Final Answer Key

Option (3) : Both Statement I and Statement II are correct.

📚 Human Health and Disease Easy

📋 Given Parameters & Problem Setup

Statement I Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.

Statement II Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.

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The 30-Second Exam Hall Shortcut: ⚡ Primary Lymphoid Organ Statements Match

⏱️ Save ~20 seconds

Both statements are verbatim NCERT lines from the Primary Lymphoid Organs section! Bone marrow produces all blood cells; both bone marrow and thymus nurture T-cell maturation!

1 Evaluate Statement I: "Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced" -> NCERT verbatim TRUE.

2 Evaluate Statement II: "Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes" -> NCERT verbatim TRUE.

3 Both statements are correct -> Option (3) / C.

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Why You Can 100% Trust This Shortcut: NCERT Biology · Human Health and Disease (Primary and Secondary Lymphoid Organs)

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Evaluate Statement I (Bone Marrow Hemopoiesis)

NCERT explicitly states: "The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced." Therefore, Statement I is completely true.

Step 2

Evaluate Statement II (T-cell Microenvironments)

NCERT explicitly states: "The thymus is a lobed organ located near the heart and beneath the breastbone... Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes." (Progenitor T-cells originate in bone marrow and migrate to thymus). Therefore, Statement II is completely true.

Step 3

Synthesize Conclusion

Both Statement I and Statement II are correct statements, matching Option (3).

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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:

Statement II is an accurate verbatim excerpt from NCERT.

⚠️

Student Fallacy (Why candidates pick this trap): Statement II is an accurate verbatim excerpt from NCERT.

2 (2)

✗ Incorrect

Verdict & Scientific Reason:

Statement I is factually correct.

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Student Fallacy (Why candidates pick this trap): Statement I is factually correct.

3 (3)

✓ 100% Correct

Verdict & Scientific Reason:

Both statements match the NCERT textbook text verbatim regarding lymphoid organ function.

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Why this is airtight: None.

4 (4)

✗ Incorrect

Verdict & Scientific Reason:

Neither statement is incorrect.

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Student Fallacy (Why candidates pick this trap): Neither statement is incorrect.

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NTA Trap Alert: Thymus Exclusivity Fallacy

Thinking only the thymus is involved in T-lymphocytes because they mature there.

🛡️ How to avoid the -1 mark: Bone marrow produces the immature T-cell precursors and provides the initial development microenvironment before thymic migration.

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Core NEET Syllabus Standard

Biology Core Zoology · Human Health and Disease Standard Benchmark

Core Scientific Principle Tested:

"The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. The thymus is a lobed organ located near the heart... Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes."

Syllabus Focus: Primary Lymphoid Organs: Roles of Bone Marrow and Thymus

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2024 Zoology Question 191 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Primary Lymphoid Organ Statements Match

Step-by-Step Rigorous Workflow & Mathematical Proof

Evaluate Statement I (Bone Marrow Hemopoiesis)

Evaluate Statement II (T-cell Microenvironments)

Synthesize Conclusion

360° Option Elimination Engine Key Feature

NTA Trap Alert: Thymus Exclusivity Fallacy

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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