Which of the following musical instruments produces sound through the vibration of strings?

(A) Drum
(B) Flute
(C) Piano
(D) Trumpet

Answer:

(C) Piano

Inside a piano, there are strings stretched across a wooden soundboard. When a key is pressed, a hammer strikes the corresponding string, causing it to vibrate. These vibrations are transmitted through the soundboard and produce audible sound waves.

Drums produce sound through the vibration of a stretched membrane or drumhead. When the drumhead is struck, it vibrates and produces sound. Therefore, drums do not rely on strings for sound production.

Flutes are wind instruments that produce sound when air is blown across a hole, causing vibrations in the air column inside the flute. Flutes do not have strings, so they do not produce sound through string vibrations.

Trumpets also do not have strings and do not rely on string vibrations for sound production.