The correct answer is option B - Bhitari inscription.

Explanation:
Skandagupta and Kumaragupta I were two important rulers of the Gupta dynasty in India. The Bhitari inscription describes their reign and achievements in detail. Let's understand more about this inscription:

Bhitari Inscription:

- The Bhitari inscription is an important inscription of the Gupta period, discovered at Bhitari in Uttar Pradesh.
- It was written in Sanskrit language and Brahmi script.
- The inscription is dated to the year 96 of the Gupta era, which corresponds to 415 CE.
- It was composed by a court poet named Vasu, who was in the service of Kumaragupta I.
- The inscription is carved on a pillar and contains 12 lines of text.

Description of Skandagupta's Reign:

- The Bhitari inscription begins with a eulogy of Skandagupta, who is described as a great king and a protector of dharma.
- It mentions that Skandagupta faced many challenges during his reign, including invasions by the Huns and other enemies.
- The inscription describes Skandagupta's military campaigns and victories against these enemies. It mentions that he defeated the Huns and saved India from their tyranny.
- The inscription also mentions Skandagupta's religious and cultural achievements. It states that he performed many yajnas and built many temples and shrines for the worship of gods and goddesses.

Description of Kumaragupta I's Reign:

- The Bhitari inscription then goes on to describe the reign of Kumaragupta I, who succeeded Skandagupta as the king of the Gupta dynasty.
- Kumaragupta I is described as a virtuous king who followed the path of dharma and justice.
- The inscription mentions that Kumaragupta I faced many challenges during his reign, including rebellions and invasions by foreign enemies.
- It describes Kumaragupta I's military campaigns and victories against these enemies. It mentions that he defeated the Shakas, the Hunas, and other enemies of the Gupta empire.
- The inscription also mentions Kumaragupta I's religious and cultural achievements. It states that he performed many yajnas and built many temples and shrines for the worship of gods and goddesses.

Conclusion:

The Bhitari inscription is an important source of information about the reigns of Skandagupta and Kumaragupta I. It provides insights into their military campaigns, victories, religious and cultural achievements, and their contributions to the Gupta dynasty.

The correct answer is Bhitari inscription.