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': 'Amblyopia means \nSelect and explain. \nA. Colour blindness, B. Any detion from normal usual function of eye, C. Squint, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Any detion from normal usual function of eye', 'role': 'assistant'}]