13. It is a classification of instruments that is played by means of plucking the strings.

A. Membraphone
B. Aerophone.
C. Idiophone.
D. Chordophone

14. It is a classification of instrument that werein sound produced by air.
A. Membraphone
B. Aerophone.
C. Idiophone.
D. Chordophone

15. It is a classification of instruments that werein sound produced by means of vibrating the instrument.
A. Membraphone
B. Aerophone.
C. Idiophone.
D. Chordophone.​