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
The axial length of the eyeball at bih is ---% of adult eye 
Select and explain. 
A. 100, B. 90, C. 70, D. 40
C: 70
Answer: C: 70 
Explanation: 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