Explanation:

- The Nanda dynasty was a powerful dynasty in ancient India that ruled over the region of Magadha.

- Mahapadma Nand is widely recognized as the founder of the Nanda dynasty. He is known for establishing the dynasty's rule and significantly expanding its territories.

- Aditya Nanda is not historically noted as founding the Nanda dynasty, making this option less relevant.

- Dhana Nand was a ruler later in the Nanda dynasty, known for his wealth and the eventual confrontation with Chandragupta Maurya.

- Given these explanations, your answer is Option 1: Mahapadma Nand, and "".