Correct Option: D

The sarod is a stringed musical instrument, used mainly in Indian classical music. The conventional sarod is an 20-25-stringed lute-like instrument — four to five main strings used for playing the melody, one or two drone strings, two chikari strings and nine to eleven sympathetic strings. Sarod strings are made either of steel or phosphor bronze. The Sarod has four melody strings tuned to Sa, Pa, Sa, Ma and it is played with a triangular plectrum.