Answer : 4. "गुप्त"
Explanation :

In Ancient India, the Gupta Dynasty ruled the middle of the 3rd century (approximately) to 543 AD. The Gupta dynasty period is referred to as the 'Classical Age or Golden Age of Ancient India. Sri Gupta was the founder Gupta dynasty Sri Gupta was followed by his son Ghatokkacha and was followed by his son Chandragupta. Both assumed the title of Maharaja.