Question

Match the following physical phenomena from the perspective of monsoonal circulation: 

Column-1	Phenomenon	Column-2	Region
a)	Reversal of East–West temperature gradient with seasons	i	Over the tropics
b)	Reversal of North–South temperature gradient with seasons	ii	Indian Ocean
c)	Surface cooling and deepening of mixed layer	iii	Over mid-latitudes
d)	Northward movement of south equatorial current	iv	Arabian Sea

• A. a-i, b-iii, c-ii, d-iv
• B. a-iii, b-i, c-iv, d-ii
• C. a-iii, b-ii, c-iv, d-i
• D. a-ii, b-i, c-ii, d-iv

Hint:

- East–West gradient reversal → tropics. - North–South gradient reversal → mid-latitudes. - Surface cooling/mixing → Indian Ocean. - South Equatorial Current shifts north → Arabian Sea.

Answer 1

The Correct Option is B

Step 1: Match each phenomenon.
- (a) Reversal of East–West gradient with seasons → Over the tropics. Example: monsoon-driven gradient between Indian Ocean and Asian landmass. → a-i 
- (b) Reversal of North–South gradient with seasons → Over mid-latitudes. Seen in hemispheric circulation changes with seasonal heating. → b-iii 
- (c) Surface cooling and deepening of mixed layer → Indian Ocean. Monsoon winds enhance vertical mixing, especially in Arabian Sea & Bay of Bengal. → c-ii 
- (d) Northward movement of South Equatorial Current → Arabian Sea. Monsoonal reversal pushes SEC northward into Arabian Sea. → d-iv 

Step 2: Verify with options.
This matches with option (A). Final Answer: \[ \boxed{\text{(A) a-i, b-iii, c-ii, d-iv}} \]