Prince Ellara was associated with the Chola dynasty of Dravida rulers. The Chola dynasty was one of the longest-lasting dynasties in the history of southern India. It emerged in the 9th century AD and reached its peak during the reign of Rajaraja Chola I and his son Rajendra Chola.

Though the correct answer is provided as option 2, it is important to note that Prince Ellara did not conquer Sri Lanka in the second century BC. Historical records indicate that it was actually Elara, a Tamil king from the Chola dynasty, who conquered Sri Lanka in the second century BC. Therefore, the correct answer should be Alert - correct answer should be 3 (Pandya).