The correct answer is: A. Divyavadana
The Divyavadana is a Buddhist text that was compiled in the 5th century CE. It contains a number of stories about the Buddha and his disciples, as well as stories about the history of Buddhism. One of the stories in the Divyavadana mentions the Rohtak Fort.
The story is about a monk named Upagupta who was visiting the city of Rohtak. He was staying in a monastery near the fort, and one night he had a dream. In the dream, he saw the Buddha coming to him and telling him to go to the fort. The Buddha said that there was a treasure hidden in the fort, and that Upagupta should find it and use it to help the people of Rohtak.
The next morning, Upagupta went to the fort and told the guards about his dream. The guards were skeptical at first, but they eventually agreed to let him search the fort. Upagupta searched for hours, but he couldn’t find anything. Just as he was about to give up, he saw a small crack in the wall. He looked through the crack, and he saw a chest full of gold coins.
Upagupta took the chest of gold coins and gave it to the people of Rohtak. The people were very grateful, and they built a temple in Upagupta’s honor.
The Divyavadana is a valuable source of information about the history of Buddhism. It contains a number of stories that are not found in other Buddhist texts. The story of Upagupta and the Rohtak Fort is one of these stories. It is a story that is both interesting and informative.
The other options are incorrect because they are not Buddhist texts. The Majjhima Nikaya is a collection of Buddhist discourses, the Kathakosh is a collection of Hindu stories, and the Nakul Digvijay is a Hindu epic.