This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
All of the following muscles are composite muscle except 
Select and explain. 
A. Pectineus, B. Rectus femoris, C. Adductor magnus, D. Biceps femoris
B: Rectus femoris
Answer: B: Rectus femoris 
Explanation: COMPOSITE/ HYBRID MUSCLE:-Muscles with double nerve supply 1. Pectineus:- anterior fibres by femoral nerve, posterior fibres by anterior division of obturator nerve.2. Adductor Magnus:-Adductor pa by posterior division of obturator nerve, Hamstring pa by tibial pa if sciatic nerve.3. Biceps femoris- long head by tibial pa of sciatic nerve, sho head by common peroneal pa of sciatic nerve.Rectus femoris- femoral nerve.Only one nerve supply, hence not composite muscle.{Reference: BDC 6E }