Given below are two statements, one is 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 from the codes given below :

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

(A) is false, but (R) is true.

C

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

D

(A) is true, but (R) is false.

Result

Your answer: — · Correct: B

Explanation

Assertion (A) is false. While jet streams were indeed discovered and their impact realized by pilots during World War II, they are predominantly westerly winds (flowing from west to east) in both the Northern and Southern Hemispheres. They are not easterly winds, although a temporary Tropical Easterly Jet does exist over India during the monsoon.

Reason (R) is true. Jet streams are high-velocity winds located near the tropopause. While their average speeds are lower, the wind speed in the central core of a jet stream can frequently reach 300 to 500 km/hour, particularly during the winter season when the temperature gradient between the poles and the equator is most intense.

Since the assertion is incorrect regarding the wind direction, the correct choice is B.

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SIMILAR QUESTIONS

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Assertion (A) : Babur wrote Tuzk-e-Babri in Chagatai Turki.
Reason (R) : Turki was the official language of the Mughal Court.
Select the correct answer from the code given below :
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Given below are two statements one is labelled as Assertion (A) and the other as Reason (R).
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Reason (R) : Limnetic zone is open water zone.
Select the correct answer from the code given below :
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Question map

Explanation

SIMILAR QUESTIONS

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).Assertion (A) : Babur wrote Tuzk-e-Babri in Chagatai Turki.Reason (R) : Turki was the official language of the Mughal Court.Select the correct answer from the code given below :Code :

Given below are two statements one is labelled as Assertion (A) and the other as Reason (R).Assertion (A) : Phytoplankton grow in abundance in the limnetic zone.Reason (R) : Limnetic zone is open water zone.Select the correct answer from the code given below :Code :

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Babur wrote Tuzk-e-Babri in Chagatai Turki.
Reason (R) : Turki was the official language of the Mughal Court.
Select the correct answer from the code given below :
Code :

Given below are two statements one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Phytoplankton grow in abundance in the limnetic zone.
Reason (R) : Limnetic zone is open water zone.
Select the correct answer from the code given below :
Code :