Chandragupta Maurya’s campaigns brought him into conflict with a foreign ruler, one with whom he eventually worked out a treaty. That ruler was Question 15 options: Attila the Hun. The First Emperor of Qin, who was ruling China. The ruler of Persia, Darius III. A general who had served Alexander the Great.

A general who had served Alexander the Great.

Explanation:

He waged war against Seleucus I Nicator, who was the founder of his own Dynasty. After Alexander's death he received the rule of Babylonian satrapy.He participated in the struggles of the Diadochi, ruled Babylon, conquered Media and Persia, gained Syria and Asia Minor. He took the imperial title and after his victory over the ruler of India, Chandragupta, the title Nicator.