Correct Answer : Option (D) - Bhitari pillar inscription of Skandagupta
The Bhitari pillar inscription of Skandagupta, was discovered in Bhitari, Saidpur, Ghazipur, Uttar Pradesh, and dates to the reign of Gupta Empire ruler Skandagupta (c. 455 – c. 467 CE).
Among other things, the inscription is extremely important in understanding the chronology of the various Gupta rulers. It also mentions the conflict between Skandagupta and the Pushyamitras as well as the Hunas.