Consider the following statements in the context of the rule of Nandas: 1. Alexander invaded North-Western India during their reign. 2. Chandragupta Maurya overthrew Dhanananda to establish Mauryan rule. 3. Pliny, a Roman writer estimated the army of Nanda dynasty. Which of the statements given above is/are correct?

Alexander invaded North-Western India during his reign; but he could not proceed towards the Gangetic plains because of his army’s refusal. Hence, statement 1 is correct. He inherited a huge empire from his father. According to Pliny, Roman writer, he possessed a standing army of 200,000 infantry, 20,000 cavalry, 3000 elephants and 2000 chariots. He became a powerful ruler because of this. Hence, statement 3 is correct. Finally he was overthrown by Chandragupta Maurya along with Chanakya, which led to the foundations of the Maurya Empire in Magadha. Hence, statement 2 is correct.