Trivia: Which is NOT one of the four main instrument groups in an orchestra?
The correct answer is Keyboard
So why is this answer correct? : A traditional orchestra includes groups of string, brass, percussion, and woodwind instruments. Keyboards are not always included, but it’s not uncommon to see them in an orchestra. If an instrument like a piano or a celesta is present, there is usually only one, meaning they stand alone without being grouped with other instruments.