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': 'The ischial tuberosity provides attachment to - \nSelect and explain. \nA. Obturator internus, B. Quadratus femoris, C. Gluteus maximus, D. Adductor magnus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]