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
Flexor of hip joints are all except 
Select and explain. 
A. Psaoas major, B. Saorius, C. Gluteus maximus, D. Rectus femoris
C: Gluteus maximus
Answer: C: Gluteus maximus 
Explanation: Muscles assisting in flexion are psoas major ,iliacus,saorius ,rectus femoris and pectineus. Gluteus maximus is the chief extensor of the hip joint. Reference: Textbook of anatomy,Abdomen and Lower limb, Vishram Singh, 2nd editon, page no.383