It is an example of air column or wind instrument.
Guitar
Flute
Sitar.
Drum.
Hence, option (B) is the correct answer.
The decrease in the length of the air column of a wind instrument:
Give two examples of each of the following :
(a) stringed musical instruments. (b) wind musical instruments.
(c) membrane musical instruments. (d) plate type musical instruments.
Instruments have air columns, which vibrate and produce sound.
A trumpet is an example of a __________.instrument.