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': 'A patient presents with compound fracture of Tibia with 1 cm opening in skin. Which grade it belongs? \nSelect and explain. \nA. Grade I, B. Grade II, C. Grade IIIA, D. Grade IIIB', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Grade I', 'role': 'assistant'}]