Option 1: Both A and R are true and R is the correct explanation of A.

This option suggests that both statement A (Northern Gujarat receives less rainfall from southwest monsoon) and statement R (Rainshadow regions receive less rainfall) are true. It further states that statement R is the correct explanation for statement A.

Option 2: Both A and R are true but R is not a correct explanation of A.

This option agrees that both statements A and R are true. However, it differs by stating that statement R is not a correct explanation for statement A. In other words, while it is true that Northern Gujarat receives less rainfall from the southwest monsoon, the reason for this is not because it is in a rainshadow region.

Option 3: A is true but R is false.

This option suggests that statement A is true (Northern Gujarat receives less rainfall from the southwest monsoon), but statement R is false. In other words, the reason for Northern Gujarat receiving less rainfall is not related to rainshadow regions.

Option 4: A is false but R is true.

This option states that statement A is false (Northern Gujarat does not receive less rainfall from the southwest monsoon), but statement R is true (rainshadow regions receive less rainfall).