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: Orthopaedics
[{'content': 'Tibial fracture with >1 cm wound, slight conjunction and moderate crushing is - \nSelect and explain. \nA. Grade I, B. Grade II, C. Grade III A, D. Grade III B', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Compound fracture\n\nCompound fracture also called open fracture, in which fracture communicates with the external environment, i.e., overlying soft tissue coverage (skin and muscles) is breached.\nOpen fractures are typically caused by high energy injuries such as car crashes, falls, or sports injuries.\nGustila and Anderson classified open fracture into following types.', 'role': 'assistant'}]