Consider the following statements:

Statement-I: Thickness of the troposphere at the equator is much greater as compared to poles.

Statement-II: At the equator, heat is transported to great heights by strong convectional currents.

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-ICorrect answer
2. (b) Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
3. (c) Statement-I is correct, but Statement-II is incorrect
4. (d) Statement-I is incorrect, but Statement-II is correct

Answer: (a)