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': 'Muscle not in relation with structure marked A \nSelect and explain. \nA. Gluteus maximus, B. Gluteus medius, C. Gluteus minimus, D. Pyriformis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The marked structure is Greater trochanter. Gluteus maximus gets inserted to lliotibial tract.\nAll other 3 muscles get inserted to Greater trochanter.', 'role': 'assistant'}]