Which mauryan empreror became an ascetic under the caca saint Bhadrabahu

Chandragupta Maurya, the founder of the Mauryan Empire, abdicated his throne around 298 BCE and became a Jain ascetic under the sage Bhadrabahu. He migrated to Shravanabelagola in Karnataka where he spent his final years in meditation and attained sallekhana (voluntary fasting). This historical fact makes option B correct, despite the typo 'caca' instead of 'Jaina'.