Question

Assertion (A): Mast cells secrete serotonin.
Reason (R): Vasodilators cause inflammation in response to infection.

• A. Both A and R are correct and R is the correct explanation of A.
• B. Both A and R are correct but R is not the correct explanation of A.
• C. A is correct but R is incorrect.
• D. A is incorrect but R is correct.

Hint:

Mast cells release various substances like serotonin and histamine, but vasodilation occurs due to other mechanisms such as the action of prostaglandins and bradykinin.

Answer 1

The Correct Option is B

Mast cells do indeed secrete serotonin, which is involved in inflammatory responses. However, the reason that vasodilators cause inflammation is not directly linked to the secretion of serotonin by mast cells, thus the reason does not fully explain the assertion.