The correct answer is: A. Mahapadmananda
Mahapadmananda was the founder of the Nanda dynasty, which ruled over Magadha in the 4th century BCE. He was a powerful ruler who expanded the Nanda kingdom and brought much of the Indian subcontinent under his control. He was also a patron of the arts and sciences, and his reign was a time of great cultural and economic prosperity.
Kakvarna was a Nanda king who ruled after Mahapadmananda. He was a weak ruler who was unable to maintain the power of the Nanda dynasty. He was eventually overthrown by Chandragupta Maurya, who founded the Mauryan Empire.
Dhana Nanda was the last Nanda king. He was a cruel and oppressive ruler who was eventually overthrown by Chandragupta Maurya.
Nagdashak was a Nanda general who fought against Chandragupta Maurya. He was defeated and killed by Chandragupta Maurya.
Mahapadmananda was the most successful of the Nanda rulers. He was a powerful and capable ruler who expanded the Nanda kingdom and brought much of the Indian subcontinent under his control. He was also a patron of the arts and sciences, and his reign was a time of great cultural and economic prosperity.