The correct option is B Chandragupta Maurya
Chandragupta Mauryan was the first ruler who followed Jainism in the late years of his life. He had to face famine during his reign. He moved to south with his spiritual guru Bhadrabhau. He performed Santhara (fast unto death) in Shravanbelgola in Karnataka. At the Chandragiri hill near Shravanbelgola in Karnataka, some stone inscription favors the fact.