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 anterior uveitis, pupil is \nSelect and explain. \nA. Oval, B. Circular, C. Small, irregular, D. Any of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Small & irregular', 'role': 'assistant'}]