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: Surgery
. Trendelenburg sign is positive due to the involvement of: March 2009 
Select and explain. 
A. Gluteum maximus, B. Gluteus medius, C. Psoas major, D. Adductor magnus
B: Gluteus medius
Answer: B: Gluteus medius 
Explanation: Ans. B: Gluteus Medius