The correct answer is Raja Kuru.
Brahmasarovar is a sacred lake located in Kurukshetra, India. It is said to have been created by Brahma, the creator god, and is one of the most important pilgrimage sites in Hinduism. The lake is believed to have healing powers and is said to be a place of great spiritual significance.
Raja Kuru was the founder of the Kuru dynasty and the ancestor of the Pandavas and Kauravas. He is said to have built the Brahmasarovar lake as a place of worship for Brahma. The lake is said to be one of the most important landmarks in Kurukshetra and is a popular tourist destination.
The other options are incorrect. Raja Bharat was the grandson of Raja Kuru and the father of Hastinapura. Ashoka was the Mauryan emperor who ruled over India in the 3rd century BCE. The Pandavas were the five sons of Pandu and Kunti, who fought against the Kauravas in the Kurukshetra War.