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 are true about gluteus maximus except 
Select and explain. 
A. Supplied by superior gluteal nerve, B. Causes extension at hip, C. Inseion is at gluteal tuberosity, D. It is lateral rotator of thigh
A: Supplied by superior gluteal nerve
Answer: A: Supplied by superior gluteal nerve 
Explanation: GLUTEUS MAXIMUS:- Origin : iliac crest (outer slope)Posterior gluteal line,posterior pa of gluteal surface of ilium,Aponeurosis of erector spinae,dorsal surface of lower sacrum,side of coccyx, sacrotuberous ligament,fascia covering gluteus medius. Inseion: gluteal tuberosity Iliotibial tract Nerve supply: inferior gluteal nerve (L5,S1,S2)Action: chief extensor of thigh at hip joint Lateral rotation of thigh Abduction of thigh It suppos both hip and knee when these joints are slightly flexed. <img src=" /> Reference: BDC 6E pg no.68}