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
Anterior posterior diameter of Eye ball is 
Select and explain. 
A. 23 mm, B. 23.5 mm, C. 22 mm, D. 24 mm
D: 24 mm
Answer: D: 24 mm 
Explanation: Anterior posterior diameter of Eye ball is 24 mm.