This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Central macular fixation develops at \nSelect and explain. \nA. 3 weeks, B. 6 weeks, C. 3 months, D. 6 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The critical period of developed of fixation reflex is 5-6 months of age.This is the reason why unilateral cataracts in children should be operated early.Remember - Binocular vision develops at 5-6 years.', 'role': 'assistant'}]