The correct option is B 2, 3, 1, 4
Dhana Nanda insulted Chanakya by calling him an ugly Brahmin. Chanakya felt humiliated and vowed that he would not re-tie his Brahmin topknot until he had driven King Dhanananda out of power and destroyed his whole clan. He mentored Chandragupta Maurya. Later, by defeating Dhana Nanda, Chandragupta became the king of the Mauryan Empire in 321 B.C.E.