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
[{'content': 'Exsanguinating blood loss in? \nSelect and explain. \nA. Closed humerus fracture, B. Closed tibia fracture, C. Open femur fracture, D. Open humerus fracture', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Open femur fracture", 'role': 'assistant'}]