Explanation:

3rd option is correct.
Chandragupta Mauryan emperor accompanied Bhadrabahu to South India.
Chandragupta Maurya (reign: 321–298 BCE) was the founder of the Maurya Empire in ancient India. He was born in a humble family, orphaned and abandoned, raised as a son by another pastoral family, then according to Buddhist texts, was picked up, taught and counselled by Chanakya, the author of the Arthashastra.