The correct answer is (a). The Rajas of Bobbili were renowned for their valor and resistance to British expansion. They were a powerful Telugu dynasty that ruled over the Bobbili region in Andhra Pradesh from the 16th to the 19th centuries. The Rajas of Bobbili were known for their bravery and military prowess, and they fought several battles against the British East India Company. The most famous of these battles was the Battle of Bobbili, which was fought in 1757. The Rajas of Bobbili were eventually defeated by the British, but they are still remembered for their courage and resistance.
Option (b) is incorrect because the Rajas of Bobbili were not known for their land reforms. They did not implement any major land reforms during their rule.
Option (c) is incorrect because the Rajas of Bobbili were not known for their philanthropy. They did not donate large sums of money to charity or build any major public works projects.
Option (d) is incorrect because the Rajas of Bobbili were not known for their administrative acumen. They did not implement any major administrative reforms during their rule.