The correct answer is option 1 - Sunga dynasty. In Kalidasa`s play "Malavikagnimitra", the hero, Agnimitra, belonged to the Sunga dynasty. The Sunga dynasty was an ancient Indian dynasty that ruled the Magadha region of northern India from around 185 BCE to 73 BCE. They succeeded the Maurya empire, which was ruled by Chandragupta Maurya and Ashoka the Great.

The Kanva dynasty, mentioned in option 2, was another ancient Indian dynasty that ruled the Magadha region, but this was before the Sunga dynasty. The Kanva dynasty ruled from around 75 BCE to 30 BCE.

The Satvahana dynasty, mentioned in option 3, was a South Indian dynasty that ruled from around 230 BCE to 220 CE. They were known for their patronage of arts and literature.

The Gupta dynasty, mentioned in option 4, was an ancient Indian dynasty that ruled from around 320 CE to 550 CE. They are often referred to as the "Golden Age" of India because of their advancements in various fields such as science, mathematics, and art.

In conclusion, Agnimitra, the hero of Kalidasa`s