Question

Assertion (A): Thymosins secreted by thymus gland play significant role in strengthening of immune system.
Reason (R): They play a major role in differentiation of T-lymphocytes.

• A. Both (A) and (R) are true, (R) is the correct explanation of (A)
• B. Both (A) and (R) are true, (R) is not the correct explanation of (A)
• C. (A) is true, but (R) is false
• D. (A) is false, but (R) is true

Hint:

Link thymic hormones (thymosins) → T-cell differentiation → cellular immune competence.

Answer 1

The Correct Option is A

• Thymosins are hormones/peptides produced by the thymus that are involved in maturation and differentiation of T-lymphocytes (thymic education).
• Differentiation and maturation of T-cells strengthen cellular immunity; thus R directly explains A.
• Therefore the correct choice is (1) Both (A) and (R) are true, (R) is the correct explanation of (A).