Which of the following is NOT a main orchestral group or family? A. Percussion B. Brass C. Vibraphones D. Strings

The correct answer is C. Vibraphones.The main orchestral groups or families are:A. PercussionB. BrassD. StringsVibraphones are a type of percussion instrument, but they are not considered a main orchestral group or family on their own. The main orchestral groups or families are larger categories that include a variety of instruments.