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
[{'content': 'All are abductors of thigh, except: \nSelect and explain. \nA. Gluteus medius, B. Gluteus minimus, C. Saorius, D. Piriformis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Piriformis', 'role': 'assistant'}]