Given below are two statements, one labeled as Assertion (A) and the other labeled as Reason (R). **Assertion (A):** Ajatashatru, the ruler of Magadha, spent over sixteen years waging a protracted war to destroy the Vajjika confederacy. **Reason (R):** The internal unity of the Vajjians, maintained through regular assemblies, adherence to traditional laws, and respect for elders, made them militarily impregnable to direct frontal assaults. Select the correct answer using the code given below:

Options:

• A: Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
• B: Both Assertion (A) and Reason (R) are true but Reason (R) is NOT the correct explanation of Assertion (A).
• C: Assertion (A) is true but Reason (R) is false.
• D: Assertion (A) is false but Reason (R) is true.

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