The correct answer is: a) Harihara and Bukka Raya.
Harihara and Bukka Raya were brothers who founded the Vijayanagara Empire in 1336. They were originally feudatories of the Hoysala Empire, but they rebelled against the Hoysala king Veera Ballala III in 1336. They defeated the Hoysala army and established their own kingdom in the Deccan Plateau. The Vijayanagara Empire was one of the largest and most powerful empires in India. It lasted for over 200 years and reached its peak under the rule of Krishna Deva Raya in the 16th century.
The other options are incorrect.
- Option b) Krishna Deva Raya was a ruler of the Vijayanagara Empire. He was the son of Deva Raya I and ruled from 1509 to 1529. He is considered to be one of the greatest rulers of the Vijayanagara Empire.
- Option c) Deva Raya II was a ruler of the Vijayanagara Empire. He was the son of Krishna Deva Raya and ruled from 1529 to 1542. He was a capable ruler, but his reign was marked by conflict with the Bahmani Sultanate.
- Option d) Saluva Narasimha Raya was a ruler of the Vijayanagara Empire. He was the son of Harihara II and ruled from 1485 to 1491. He was a capable ruler, but his reign was short-lived.