Answer: Mahapadma Nanda
Notes: Mahapadma Nanda was the first ruler to merge Kalinga with the Magadha empire. He founded the Nanda empire and he was the first emperor of the Nanda empire according to the Puranas. Kalinga was conquered by Mahapadma Nanda but it seceded from the Magadha empire sometime after the fall of the Nanda dynasty. It was later reconquered by the Mauryan king Ashoka.
