Option 1: Besnagar is known for its pillar of Garuda, an archaeological monument related to Vaishnavism, not Shaivism, so this pairing is incorrect.

Option 2: Bhaja is indeed well-known for its Buddhist cave shrine. The Bhaja caves are a group of 22 rock-cut caves dating back to the 2nd century BC located in Pune, India. The caves are 400 feet above the village of Bhaja. This makes the pair correctly matched.

Option 3: Sittanavasal is also correctly paired, known for its Jain cave shrine. Sittanavasal is a small hamlet in Pudukkottai district in Tamil Nadu. It is known for the Sittanavasal Cave, a 2nd-century Jain complex of caves.

Therefore, options 2 and 3 pairs are correctly matched, while option 1 is not correctly matched. Hence, the correct choice is option 2 (Only two).