The correct answer is: A. Samudra Varman.
Samudra Varman was the founder of the Varman dynasty in Assam. He was a powerful ruler who expanded the kingdom and made it a major power in the region. He was also a patron of the arts and literature.
B. Bhuti Varman was the son of Samudra Varman. He succeeded his father as king and ruled for a short period of time. He was a capable ruler, but he was not as powerful as his father.
C. Mahendra Varman was the grandson of Samudra Varman. He succeeded his father, Bhuti Varman, as king. He was a powerful ruler who expanded the kingdom even further. He was also a patron of the arts and literature.
D. Pushyavarman was the son of Mahendra Varman. He succeeded his father as king and ruled for a long period of time. He was a capable ruler, but he was not as powerful as his father or grandfather.
The Varman dynasty was a powerful dynasty that ruled Assam for over 300 years. They were a major power in the region and their rule was marked by peace and prosperity.