This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Following is a cause of secondary angle closure glaucoma - \nSelect and explain. \nA. Pseudophakia, B. Coicosteroid induced, C. Angle recession glaucoma, D. Congenital glaucoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The abnormal lens may contribute by either causing pupillary block or by pushing the peripheral iris forward into the angle structures. Ref :Ophthalmology A K Khurana 6th edition chapter-10 page no :241', 'role': 'assistant'}]