This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Major extensor of the thigh is - 
Select and explain. 
A. Gluteus maximus, B. Psoas major, C. Obturator internus, D. Iliacus
A: Gluteus maximus
Answer: A: Gluteus maximus 
Explanation: Extension of hip is by Gluteus maximus and hamstrings.