Explanation:

The Vijayanagara Empire was a powerful South Indian kingdom that played a crucial role in medieval Indian history. \nA. Vijaya Raja: There is no prominent historical figure named Vijaya Raja who is credited with founding the Vijayanagara Kingdom. This name does not correspond to any known founder of the empire. \nB. Harihar II: Harihara II was a significant ruler of the Vijayanagara Empire, reigning from 1377 to 1404 CE. He was the son of Bukka Raya I and succeeded his father. While he expanded the empire and strengthened its administration, he was not one of its original founders. \nC. Harihar and Bukka: This is the correct answer. The Vijayanagara Empire was founded in 1336 CE by two brothers, Harihara I (also known as Hakka) and Bukka Raya I. They were chieftains who had previously served under the Kakatiya dynasty of Warangal and later the Kampili kingdom. They established the Sangama dynasty, which was the first dynasty to rule the Vijayanagara Empire, with its capital at Hampi. \nD. Bukka II: Bukka II was a later ruler of the Vijayanagara Empire, who reigned briefly around 1404-1406 CE, succeeding Harihara II. He was not one of the original founders of the empire.