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': 'In acute congestive glaucoma, pupil is: \nSelect and explain. \nA. Oval and horizontal, B. Oval and veical, C. Circular, D. Slit like', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Oval & veical In acute congestive glaucoma pupil is veically oval, dilated & nonreacting Q and anterior chamber is very shallow Q; where as in acute anterior uveitis pupil is small, irregular & sluggishly reacting Q and anterior chamber is deep.', 'role': 'assistant'}]