Consider the following statements:

1. Rainfall is one of the reasons for weathering of rocks.
2. Rain water contains carbon dioxide in solution.
3. Rain water contains atmospheric oxygen.
   Which one of the above statements is correct?

Both Statement-II and Statement-III are correct and both of them explain Statement-I

Both Statement-II and Statement-III are correct, but only one of them explains Statement-I

Only one of the Statements II and III is correct and that explains Statement-I

Neither Statement-II nor Statement-III is correct