The correct answer is A. Sarangi.
Sarangi is a bowed string instrument used in Indian classical music. It is a long-necked instrument with a gourd body and three main strings, as well as a number of sympathetic strings. The sarangi is played with a bow, and the player uses their fingers to stop the strings at different points to produce different notes.
Alghoza is a wind instrument used in folk music from Afghanistan, Pakistan, and India. It is a double reed instrument, similar to the oboe. The alghoza is played by blowing into the mouthpiece and vibrating the reeds with the player’s lips.
Nagada is a drum used in Indian classical music. It is a large, barrel-shaped drum with two heads. The nagada is played by striking the heads with the hands.
Tasha is a small drum used in folk music from Afghanistan, Pakistan, and India. It is a cylindrical drum with one head. The tasha is played by striking the head with the hand.
Sarangi is a string instrument because it produces sound by vibrating strings. The other three instruments are not string instruments because they do not produce sound by vibrating strings.