JEE Main levelSingle correct optionDifficulty 2 of 3el069
Assertion: Brompheniramine relieves the symptoms of an allergy but does not reduce the secretion of acid in the stomach.
Reason: Histamine causes allergic symptoms and acid secretion through different receptors, and brompheniramine blocks only the receptors responsible for the allergic symptoms.
ABoth Assertion and Reason are true and the Reason is the correct explanation of the Assertion
BBoth Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
CAssertion is true but Reason is false
DAssertion is false but Reason is true
Answer: A
Brompheniramine is an H1 receptor antagonist, while acid secretion is controlled by H2 receptors. Both statements are true and the receptor difference explains why the drug does not affect stomach acid.