Consider the following statements :Statement-I :The atmosphere is heated more by incoming solar radiation than by terrestrial radiation.Statement-II :Carbon dioxide and other greenhouse gases in the atmosphere are good absorbers of long wave radiation.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. The atmosphere is heated more by terrestrial long-wave radiation, not by incoming solar.

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. Statement-I is false.

3. C

   Statement-I is correct, but Statement-II is incorrect

   I correct, II incorrect. I is the false limb; greenhouse gases do absorb long-wave.

4. D

   Statement-I is incorrect, but Statement-II is correct

   I incorrect, II correct. Earth heats the air; CO2 and other GHGs absorb outgoing long-wave.

Summary. Official key is (d). Incoming solar radiation is mostly short-wave; the air is relatively transparent to it. The surface absorbs sunlight and radiates long-wave infrared, which greenhouse gases absorb — that is how the troposphere is heated. Statement-I reverses the mechanism. Statement-II is true and does not rescue I.