The correct answer is D. Pragjyotisha.
Pragjyotisha was an ancient kingdom in the Brahmaputra Valley, which is now part of Assam, India. It was mentioned in the epics Ramayana and Mahabharata. The kingdom was founded by the Naga king Bhagadatta in the 6th century BC. It was later ruled by the Varman dynasty and the Pala dynasty. The kingdom was finally conquered by the Ahoms in the 13th century.
A. Indraprastha is the capital of the Pandavas in the Mahabharata. It is located in the Kurukshetra region of India.
B. Kamrup is a region in Assam, India. It was ruled by the Kamarupa Kingdom from the 7th to the 13th centuries.
C. Ahom is a dynasty that ruled Assam from the 13th to the 19th centuries.