"Introduction of a unified currency in India" was an accomplishment of Emperor Chandragupta Maurya.
Answer: Option C
Explanation:
The discoverer of the Maurya Empire during ancient period of India is named as "Emperor Chandragupta Maurya". His birth took place in a humble family but later orphaned and abandoned. Later brought up by another pastoral family as a son. He was selected, counselled and taught a Hindu Brahmin popular as "Chanakya" or "Kautilya" the author of the Arthashastra.
During his ruling period when emperors had to deal with trade and farming he established a single currency across India to provide justice and security for farmers, merchants and traders. The coins of the Maurya Empire from 3rd Century BCE involved silver punch mark coins with wheel and elephant symbol.