The classical music form that originated in Karnataka:

Hindustani music
Carnatic music
Rabindra Sangeet
Folk music

The correct answer is: B) Carnatic music.

Carnatic music is a classical music form that originated in the Indian state of Karnataka. It is one of the two main forms of classical music in India, the other being Hindustani music. Carnatic music is characterized by its use of ragas, talas, and melakartas. Ragas are melodic frameworks, talas are rhythmic cycles, and melakartas are scales. Carnatic music is also known for its use of improvisation and its rich vocal tradition.

Hindustani music is a classical music form that originated in the northern Indian subcontinent. It is one of the two main forms of classical music in India, the other being Carnatic music. Hindustani music is characterized by its use of ragas, talas, and khayal. Ragas are melodic frameworks, talas are rhythmic cycles, and khayal is a style of vocal improvisation. Hindustani music is also known for its use of instruments such as the sitar, tabla, and sarod.

Rabindra Sangeet is a genre of Bengali art music that was created by Rabindranath Tagore. It is characterized by its use of simple melodies and lyrics that are often based on nature or religious themes. Rabindra Sangeet is often performed at weddings, festivals, and other special occasions.

Folk music is a genre of music that is typically passed down through oral tradition. It is often associated with a particular region or culture and can be characterized by its use of simple melodies and lyrics that are often about everyday life. Folk music can be performed by a solo singer or by a group of singers and musicians.