This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
All of the following are composite muscles except 
Select and explain. 
A. Adductor magnus, B. Pectinalis, C. Flexor digitorum profundus, D. Flexor digitorum superficialis
D: Flexor digitorum superficialis
Answer: D: Flexor digitorum superficialis 
Explanation: Composite muscle implies dual nerve supply.The FDS is supplied by the median nerve.Pectineus: its anterior fibres are supplied by the femoral nerve and posterior fibres by the anterior division of the obturator nerve.Adductor Magnus: the adductor pa is innervated by the posterior division of the obturator nerve while the hamstring pa is by the tibial pa of the sciatic nerve.The FDP innervation-medial half by ulnar nerve and lateral half the anterior interosseous nerve.Reference: Textbook of anatomy, Abdomen and lower limb, Vishram Singh, 2nd edition, page no.345,346, and Textbook of anatomy, Upper limb and thorax, Vishram Singh, 2nd edition, page no.110