The correct answer is: Dholak, manjira, and kartal.
Dholak is a double-headed drum that is played with the hands. It is one of the most popular folk instruments in India and is used in a variety of dances and music genres. Manjira is a small cymbal that is played by striking it against the palm of the hand. It is also used in a variety of folk dances and music genres. Kartal is a pair of small cymbals that are played by striking them together. It is also used in a variety of folk dances and music genres.
Guitar, keyboard, and drums are Western instruments that are not typically used in folk dances in Bihar. Violin and flute are classical instruments that are also not typically used in folk dances in Bihar. Sitar and tabla are Indian classical instruments that are sometimes used in folk dances in Bihar, but they are not as common as dhol, manjira, and kartal.