Option a is the correct answer. Radha Govind Sangeet Sar is a collection of classical music compositions in the Haveli Sangeet tradition, which is a form of devotional music associated with the Pushti Marg sect of Vaishnavism. It was composed by Devarshi Bhatt Brajpal under the patronage of Sawai Pratap Singh. Devarshi Bhatt Brajpal was one of the eight poets of Ashtachhap, and the author of Radha Govind Sangeet Sar. He was also known as Kumbhan Das, and was born in Kumbhalgarh, Rajasthan, in the 16th century. He was a devotee of Lord Krishna, and composed songs in praise of his divine love with Radha.