Consider the following statements:Statement I: The amount of dust particles in the atmosphere is more in subtropical and temperate areas than in equatorial and polar regions.Statement II: Subtropical and temperate areas have less dry winds.Which one of the following is correct in respect of the above statements?

1. A

   Both Statement I and Statement II are correct and Statement II explains Statement I

   Both correct and II explains I. II is false: subtropical and temperate zones have more dry, dusty winds (including trades and westerly storms), not less.

2. B

   Both Statement I and Statement II are correct but Statement II does not explain Statement I

   Both correct but II does not explain I. II still has to be true. It is not.

3. C

   Statement I is correct but Statement II is not correct

   I is correct, II is not. Dust loading is typically higher in the dry subtropics and mid-latitudes than in the washed equatorial belt or the polar ice. II’s ‘less dry winds’ is the inverted cause.

4. D

   Statement I is not correct but Statement II is correct

   I not, II correct. Dust is not lower in those belts.

Summary. Official key is (c): Statement I is correct and II is not. Dust is higher in subtropical and temperate belts than at the equatorial and polar extremes. Those belts do not have ‘less dry winds’ — they have more, which is why I is true. (a)(b) keep II; (d) flips the pair.