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': 'Kusumlata presents with acute painfull red eye and mild dilated veically oval pupil. Most likely diagnosis is: \nSelect and explain. \nA. Acute retrobulber neuritis, B. Acute angle closure glaucoma, C. Acute anterior uveitis, D. Severe kerato-conjunctivitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Acute angle closure glaucoma', 'role': 'assistant'}]