The correct option is A Bhadrabahu
Bhadrabhau spread Jainism in South India, especially in Karnataka. He lived in the court of Chandragupta Mauryan. Chandragupta Mauryan went to Shravanbelgola in Karnataka in the last year of his life along with his spiritual guru Bhadrabhau. He belonged to Digambara sect of Jainism. Bhadrabhau was the leader of undivided Sangha but later on Jainism divided into two sects - Digambara and Shwetambara.