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': "Hutchinson's pupil is characterised by \nSelect and explain. \nA. Initial ipsilateral miosis, later followed by dilatation, B. Initial ipsilateral miosis and contralateral dilatation, C. Ipsilateral mydriasis and contralateral miosis, D. None of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Initial ipsilateral miosis, later followed by dilatation', 'role': 'assistant'}]