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: Unknown
[{'content': 'A patient has developed an acute congestive glaucoma in his right eye. The prophylactic measure to be taken in the fellow eye is: \nSelect and explain. \nA. Topical steroids, B. Peripheral iridectomy, C. Antibiotics, D. Laser iridotomy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]