Which of the following is regarded to be a controversial part of the treaty of 303 (BC) between Chandragupta and Seleucus?
(a) Seleucus surrendered his large territories to Chandragupta
(b) Chadragupta made a gift of 500 elephants to Seleucus
(c) Seleucus gave his daughter in marriage to Chandragupta
(d) A Greek envoy (Megasthenes) was accredited to the Mauryan court at Pataliputra
