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:
Answer: (D) Both Statement I and Statement II are correct.. Answer: (D) Both Statement I and Statement II are correct.
- A.Both Statement I and Statement II are incorrect.
- B.Statement I is Correct but Statement II is incorrect.
- C.Statement I is incorrect but Statement II is correct.
- D.Both Statement I and Statement II are correct.✓
Correct Answer
(D) Both Statement I and Statement II are correct.
Solution & Explanation
Answer: (D) Both Statement I and Statement II are correct. Solution: NCERT states the bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced — so Statement I is correct. It also states that both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes — so Statement II is correct. Why not the others: Since both statements match the text verbatim, the options declaring either statement incorrect are wrong. NCERT Reference: NCERT Ch7, p.138, lines 10-17: "main lymphoid organ where all"