Explanation:

- Correct Answer: Option 1 - Nandas

- Chandragupta Maurya led a revolt against the Nandas. He overthrew them to establish the Maurya Empire around 321 BCE.

- Option 2 - Kushanas

- The Kushanas were a different dynasty that came into power much later, around the first century CE. They ruled a distinct region predominantly in the northwest.

- Option 3 - Shishunagas

- The Shishunaga Dynasty preceded the Nandas in ancient Indian history. They were overthrown by the Nandas.

- Option 4 - Haryankas

- The Haryanka Dynasty was an earlier ruling dynasty in Magadha, eventually succeeded by the Shishunagas.