The correct answer is: a) Hindustani music.
The tambura is a stringed instrument that provides the drone in Hindustani music. It is a long-necked lute with four strings, and is played by plucking the strings with the fingers. The tambura is used to provide a continuous background sound, or drone, which helps to keep the rhythm and melody of the music together.
Carnatic music is a classical music tradition from South India. It is similar to Hindustani music in many ways, but there are also some important differences. One of the most significant differences is that Carnatic music does not use the tambura. Instead, it uses a different instrument called the mridangam to provide the drone.
Folk music is a type of music that is passed down through oral tradition. It is often associated with a particular region or culture, and can be very diverse in terms of style and instrumentation. Some folk music traditions do use the tambura, but it is not a common instrument in folk music.
Rabindra Sangeet is a genre of Bengali music that was created by Rabindranath Tagore. It is a type of art song, and is often performed with a stringed instrument called the sitar. The tambura is not typically used in Rabindra Sangeet.