Consider the following statements: Statement I: Rainfall is one of the reasons for the weathering of rocks.

Consider the following statements:
Statement I: Rainfall is one of the reasons for the weathering of rocks.
Statement II: Rainwater contains carbon dioxide in solution.
Statement III: Rainwater contains atmospheric oxygen.

Which one of the following is correct in respect of the above statements?
(a) Both Statement II and Statement III are correct and both of them explain Statement I
(b) Both Statement II and Statement III are correct, but only one of them explains Statement I
(c) Only one of the Statements II and III is correct and that explains Statement I
(d) Neither Statement II nor Statement III is correct
Correct Answer: (a) Both Statement II and Statement III are correct and both of them explain Statement I
Explanation:
Both statements II and III are correct because rainwater does contain carbon dioxide in solution (which forms carbonic acid, contributing to chemical weathering) and atmospheric oxygen. Both these factors contribute to the weathering of rocks.
Possible Sources: Earth science and geology textbooks.