Question

Assertion (A): Thymosin plays a major role in cell-mediated immunity
Reason (R): Thymosin promotes the production of antibodies

• A. Both A and R are true. R is the correct explanation of A
• B. Both A and R are true. But R is not the correct explanation for A
• C. A is true. But R is false
• D. A is false. But R is true

Hint:

Thymosin is important for T cell development, but it does not directly participate in antibody production. The primary cells responsible for antibody production are B cells.

Answer 1

The Correct Option is B

Assertion (A): Thymosin plays a significant role in cell-mediated immunity.

This statement is true because thymosin, produced by the thymus gland, is crucial for the development and differentiation of T cells (which are central to cell-mediated immunity).

Reason (R): Thymosin promotes the production of antibodies.

This statement is false because thymosin itself does not directly stimulate antibody production; this role is primarily attributed to B cells and the humoral immune system, not thymosin. While thymosin does support T cell development, antibody production is not its primary function.

Conclusion: The assertion is true, but the reason provided does not correctly explain the assertion.

Thus, the correct answer is Option (B): Both A and R are true, but R is not the correct explanation for A.