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State PCS PYQPrelims 2024

UPPCS · Question 60

Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). Assertion (A): Jet streams discovered during World War II are high altitude easterly winds. Reason (R): Jet streams flow with a speed of 300-500 km/hour. Select the correct answer using the code given below.

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. (A) is false, but (R) is true
  3. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
  4. (A) is true, but (R) is false
Show answer & explanation

Answer: (B) (A) is false, but (R) is true

Explanation

Jet streams (noticed by WWII pilots) are mainly high-altitude westerlies, so A is false; they can reach speeds of about 300-500 km/h.