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': "Pupil is small in all of the following except: \nSelect and explain. \nA. During sleep, B. Adie's pupil, C. Argyll Robeson pupil, D. Pontine haemorrhage", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. Adie's pupil", 'role': 'assistant'}]