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: Ophthalmology
[{'content': 'Malignant glaucoma is seen in – \nSelect and explain. \nA. Malignancy, B. After surgery for cataract or glaucoma, C. Trauma, D. Thrombosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Malignant glaucoma occurs following an iridectomy, filtering surgery (Trebaculectomy) or laser irodotomy. It may also occur after cataract surgery, capsulotomy or even spontaneously.', 'role': 'assistant'}]