State PCS PYQPrelims 2025

UPPCS · प्रश्न 25

Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). Assertion (A): Evaporation of sweat from human skin dissipates body heat. Reason (R): High humidity on a hot day increases discomfort. Select the correct answer using the code given below.

  1. (A) is false, but (R) is true
  2. Both (A) and (R) are true and (R) is the correct explanation of (A)
  3. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
  4. (A) is true, but (R) is false
उत्तर देखें और व्याख्या

उत्तर: (C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

व्याख्या

Sweat cools us through latent heat of evaporation; high humidity slows evaporation and so increases discomfort. Both are true, but R does not explain A.