In the traditional classification of Indian musical instruments, which of the following is a string instrument?

Explanation

Ektara. String instruments (Tat Vadya) are those in which sound is produced by the vibration of strings. Ektara is a one-stringed folk instrument (Tat Vadya) used widely in Baul and Sufi music. Indian musical instruments are classified into Tat (string), Sushir (wind), Avanaddha (membrane), and Ghana (solid) categories.