Identify the person from the following description :
a. Founder of a great empire.
b. Cultured, scholar and a poet.
c. The famous poet Harisena was his court poet and Buddhist scholar Vasubandhu was in his court.
d. Vincent Smith praises him as the 'Indian Napoleon'.
1. Harisena
2. Kanishka
3. Samudragupta
4. Chandragupta Maurya