Read the text and determine if the sentence is true (see options at the end):

The term "four-part harmony" refers to music written for four voices or for some other musical medium—four musical instruments or a single keyboard instrument, for example—where the various musical parts can give a different note for each chord of the music.

Sentence: four-part harmony is often played in an orchestra 
Select from:
 (a). Yes;
 (b). It's impossible to say;
 (c). No;