The correct answer is A. Ajay Dhar.
Ajay Dhar was the founder of the Dhar dynasty in Jammu. He was a Rajput prince who came to Jammu from the Indian state of Rajasthan in the 10th century. He established his kingdom in the area around the city of Jammu, and his descendants ruled the region for over 200 years.
The Dhar dynasty was a powerful and influential dynasty in the history of Jammu. They were responsible for the construction of many important temples and monuments in the region, and they played a major role in the development of the local culture.
The Dhar dynasty came to an end in the 12th century, when they were overthrown by the Shahi dynasty. However, their legacy continues to this day, and they are still remembered as one of the most important dynasties in the history of Jammu.
Option B, Vajar Dhar, is incorrect. Vajar Dhar was a general in the Dhar army. He was not the founder of the dynasty.
Option C, Kirat Dhar, is incorrect. Kirat Dhar was a king of the Dhar dynasty. He was not the founder of the dynasty.
Option D, Suraj Dhar, is incorrect. Suraj Dhar was a prince of the Dhar dynasty. He was not the founder of the dynasty.