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': 'Most common cause of diplopia in orbital fracture is: \nSelect and explain. \nA. Edema and hemorrhage in and around extraocular muscles., B. Detachment of muscle insertion or origin., C. Injury to nerve supplying to muscle., D. Entrapment of muscle in fractured segment.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]