Which of the following statements is/are true about the Seleucid-Mauryan war?

1. Historians mention that it was Chandragupta Maurya’s love for Helen, the daughter of Seleucus Nikator that led to the war between the two emperors. 

2. He had secretly seen Helen and was mesmerised by her beauty and charm and fell in love with her the moment he saw her and thought of marrying her.

3. Chanakya suggested the only way to get married to her was by declaring war against Seleucus.