With reference to Indian history, consider the following pairs: Historical person : Known as 1. Aryadeva : Jaina scholar 2. Dignaga : Buddhist scholar 3. Nathamuni : Vaishnava scholar How many pairs given above are correctly matched?

Option (c) is correct because Dignaga was a pioneering Buddhist logician and Nathamuni was a foundational Vaishnava scholar who compiled the *Nalayira Divya Prabandham*. Pair 1 is incorrect because Aryadeva was a prominent Mahayana Buddhist philosopher and disciple of Nagarjuna, making the "All three pairs" option (d) the most common error. The core concept tested is the identification of major ancient and medieval Indian scholars with their respective religious and philosophical traditions.