<prompt> Which of the following muscle is not a hybrid musclePectoralis majorExtensor digitorumFlexor digitorum profundusBrachialis  <response>: Extensor digitorum Hybrid muscles are the muscles having more than one nerve supply Pctoralis major: lateral medial pectoral nerves Brachialis: additional proprioceptive fibres from radial nerve, in addition to its muscular nerve, musculocutaneous nerve. Extensor digitorum is supplied by the posterior interosseous nerve only. 