The correct answer is: a) Ahom Dynasty.
The Ahom Dynasty was a Tai-Shan dynasty that ruled the Brahmaputra Valley in northeastern India from the 13th to the 19th centuries. The Ahoms were originally from the Shan States in present-day Myanmar, and they migrated to Assam in the 13th century. They established their capital at Sibsagar, and they ruled the Brahmaputra Valley for over 600 years. The Ahoms were a powerful and influential dynasty, and they played a major role in the history of Assam.
The Sena Dynasty was a Hindu dynasty that ruled parts of India from the 11th to the 13th centuries. The Senas were originally from Bengal, and they established their capital at Nabadwip. The Senas were a powerful and influential dynasty, and they played a major role in the history of India.
The Chutiya Dynasty was a Hindu dynasty that ruled parts of Assam from the 12th to the 16th centuries. The Chutiyas were originally from the Chutiya Kingdom, which was located in present-day Assam. The Chutiyas were a powerful and influential dynasty, and they played a major role in the history of Assam.
Tibetan rulers did not establish their rule in the Brahmaputra Valley in the 13th century.