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GK QUESTION#3255

Assertion (A): Lactic acid is a short-chain organic acid that contains a hydroxyl group along with a carboxylic acid group. Reason (R): Lactic acid is a saturated fatty acid with 4 carbon atoms, commonly found esterified in animal fats.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BBoth A and R are true, but R is not the correct explanation of A.
  3. CA is false, but R is true.
  4. DA is true, but R is false.Correct answer
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Answer

D. A is true, but R is false.

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Explanation

Lactic acid has structure CH₃CH(OH)COOH and contains both a hydroxyl group and a carboxylic acid group. It has three carbon atoms. The reason’s four-carbon description is therefore false, regardless of its additional claim about animal fats. The assertion is true and the reason false.

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