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JEE Advanced levelSingle correct optionDifficulty 3 of 3el025

A drug K is described in three ways: (1) it is an anti-ulcer drug; (2) it blocks the action of histamine; (3) it binds the H2 receptor protein in the stomach wall. Match each description with the basis of classification it illustrates: pharmacological effect (P), drug action (Q), molecular target (R).

  1. A1-Q, 2-P, 3-R
  2. B1-P, 2-R, 3-Q
  3. C1-R, 2-Q, 3-P
  4. D1-P, 2-Q, 3-R

Answer: D

Anti-ulcer names the effect in the body (pharmacological effect). Blocking histamine names the biochemical action (drug action). Binding the H2 receptor protein names the biomolecule hit (molecular target). So 1-P, 2-Q, 3-R.
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