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
Sclera a thickest at: 
Select and explain. 
A. Limbus, B. Inseion of recti, C. Posterior pole, D. Equator
C: Posterior pole
Answer: C: Posterior pole 
Explanation: Posterior pole