Option a is the correct answer Alexander invaded India in 327-325 BC. The Nanda Dynasty ruler Dhananada was ruling North India at the time of Alexanders invasion. Important Tips Nandas: The Nanda dynasty-controlled Magadha in northern India from 343 and 321 BCE Nanda dynasty was founded by Mahapadma Nanda. The Nandas had a centralized administration. Chandragupta Maurya, the founder of the Maurya Empire deposed the last Nanda ruler Dhana Nanda.