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.<br /><br />The main orchestral groups or families are:<br /><br />A. Percussion<br />B. Brass<br />D. Strings<br /><br />Vibraphones 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.