(A): The substance which is responsible for the secretion of pepsin and HCl in the stomach and nasal congestion associated with common cold and allergic response to pollen is histamine.
(R): Anti allergic and antacid drugs work on different receptors.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is B.

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Detailed Solution

(A) The statement about histamine is true. Histamine is a substance that is involved in the secretion of pepsin and hydrochloric acid in the stomach, and it is also responsible for the nasal congestion associated with common cold and allergic responses to pollen.

(R) The statement about anti-allergic and antacid drugs is also true. Anti-allergic drugs such as antihistamines work by blocking the effects of histamine, while antacids work by neutralizing stomach acid. These drugs target different receptors in the body, so they have different mechanisms of action.

But (R) is not the correct explanation of (A).

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