Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). **Assertion (A):** Unlike the Himalayan rivers of North Bihar, the rivers of South Bihar like Punpun and Phalgu often dry up or shrink significantly during the summer season. **Reason (R):** The rivers of South Bihar originate from the peninsular plateau and are entirely rain-fed, lacking glacial sources. In the context of the above statements, which of the following is correct?

Options:

• A: Both A and R are true and R is the correct explanation of A
• B: Both A and R are true but R is not the correct explanation of A
• C: A is true but R is false
• D: A is false but R is true

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