The Bishnu Prasad Rabha Award recognizes outstanding contributions to:

Folk music and dance
Classical music
Theatre
All of the above

The Bishnu Prasad Rabha Award recognizes outstanding contributions to folk music and dance. It is given by the Government of Assam to individuals or institutions who have made significant contributions to the field of folk music and dance. The award was instituted in 1972 in memory of Bishnu Prasad Rabha, a renowned Assamese folk singer, dancer, and playwright. The award consists of a cash prize, a citation, and a plaque.

Bishnu Prasad Rabha was born in 1909 in the village of Bijni in the Goalpara district of Assam. He was a child prodigy and began composing songs and dances at a very young age. He was also a gifted actor and playwright. He wrote and performed many plays that were based on the folk traditions of Assam. Rabha was a strong advocate for the rights of the tribal people of Assam. He worked tirelessly to promote their culture and traditions. He also played a key role in the freedom struggle of India. Rabha died in 1962 at the age of 53. He is remembered as one of the most important figures in the history of Assamese culture.

The Bishnu Prasad Rabha Award is a prestigious award that recognizes outstanding contributions to folk music and dance. It is a fitting tribute to the life and work of Bishnu Prasad Rabha, a true legend of Assamese culture.

The other options are not correct because they do not specifically mention folk music and dance. Classical music and theatre are also important art forms, but they are not the focus of the Bishnu Prasad Rabha Award.