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JEE Main levelSingle correct optionDifficulty 2 of 3el011

Drugs X, Y and Z all contain the sulphonamide unit and are used for different purposes. Putting X, Y and Z in one class is a classification based on

  1. Apharmacological effect
  2. Bdrug action
  3. Cmolecular target
  4. Dchemical structure

Answer: D

The common feature is a shared structural unit, even though the uses differ. This is classification by chemical structure.
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