This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Procedures For Glaucoma, Subject name: Ophthalmology
[{'content': 'Laser iridotomy is useful in \nSelect and explain. \nA. Angle closure glaucoma, B. Neovascular glaucoma, C. Open angle glaucoma, D. Secondary glaucoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Angle closure glaucomaRef.: A.K. Khurana 6th ed. 1247', 'role': 'assistant'}]