The correct answer is: a) Ahom Kingdom.
The Ahom Kingdom was a powerful kingdom that ruled over much of northeastern India from the 13th to the 19th centuries. The Ahoms were originally from Tibet, but they migrated to Assam in the 13th century. They quickly established a powerful kingdom and resisted several invasions by neighboring powers, including the Burmese and the Mughals.
The Ahoms were a skilled military power and they were able to defend their kingdom against all invaders. They were also skilled in agriculture and they developed a sophisticated system of irrigation. The Ahom Kingdom was a major center of culture and learning and it produced many important works of art, literature, and architecture.
The Ahom Kingdom came to an end in the 19th century when it was conquered by the British. However, the Ahoms left a lasting legacy on the region and their culture and traditions continue to be practiced by many people in Assam today.
The other options are incorrect because:
- The Burmese kingdoms were a major threat to the Ahom Kingdom, but the Ahoms were able to resist several invasions by the Burmese.
- The Mughal Empire was a powerful empire that ruled over much of India, but it was never able to conquer the Ahom Kingdom.
- Tibetan rulers never invaded the Ahom Kingdom.