Which Kings was a Patron of Jainism?
Option 4 is the right answer.
Kharvela was the great king of kalinga (Odhisa).
He was responsible for the propagation of Jainism in the Indian subcontinent. According to the Hathigumpha inscription near Bhubaneswar, Odisha, he attacked Rajagriha in Magadha, thus inducing the Indo-Greek king Demetrius I of Bactria to retreat to Mathura. This shows his strong ties with the Sunga Empire rulers Pushyamitra Sunga and Agnimitra, who established their rule after uprooting the Mauryans.