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': 'The axial length of eyeball at birth is ……………………… % of an adult eye – \nSelect and explain. \nA. 100, B. 90, C. 70, D. 40', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Anteroposterior diameter of eyeball at birth is about 16.5 mm (70% of adult size which is attained by 7-8 years).', 'role': 'assistant'}]