Answer : 2. "विष्णुगुप्त"
Explanation :

Chanakya 'Kautilya' or 'Chanakya' or 'Vishnu Gupta' is famous all over the world as a great politician and general secretary of the Maurya Emperor Chandragupta Maurya. His personal name was 'Vishnugupt', the local name 'Chanakya' (from Chanakyavasi) and the gotra name 'Kautilya' (from Crooked). Chanakya was the prime minister of Chandragupta Maurya. It is believed that Chanakya was born 370 years before Christ as the son of sage Chanak. He was the teacher of his early days. Some historians believe that Chanak was only his guru. Being a disciple of Chanak, he was named 'Chanakya'.