This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Development and clinical examination, Subject name: Ophthalmology
[{'content': 'The axial length of the eyeball at bih is ---% of adult eye \nSelect and explain. \nA. 100, B. 90, C. 70, D. 40', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The axial length of the eyeball at bih 70% of an adult eye. Anteroposterior diameter is 24 mm in adult & Anteroposterior diameter of the eyeball is about 16.5 mm at bih (70% of the adult size which is attained by 7-8 years). Reference : A K KHURANA OPHTHALMOLOGY, Edition4, Page-11', 'role': 'assistant'}]