Who among the following was the last ruler of the Nanda dynasty?

Dhanananda

The correct answer is Option 4- Dhanananda

The last ruler of the Nanda dynasty was Dhanananda. He was the son of Mahapadma Nanda, the founder of the dynasty. Dhanananda was a powerful ruler, but he was also unpopular with his subjects. He was defeated by Chandragupta Maurya in 321 BCE, which marked the end of the Nanda dynasty and the beginning of the Maurya Empire.

The other options are incorrect:

• Kaivarta was one of the nine Nanda kings mentioned in the Puranas.
• Govishanaka was another Nanda king mentioned in the Puranas.
• Panduka was the son of Dhanananda.