Correct option is B
- Kanishka was the greatest king of the Kushana dynasty.
- He ruled from 78 A.D. to 102 A.D.
- His empire extended upto Bihar and included areas of Central India, Gujarat, Sind, Punjab, Afghanistan and Bactria.
- He organised 4th Buddhist council, where scholars met and discussed important matters.
- The first year of Kanishka's era was 127 AD.