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
Weakest poion of sclera is 
Select and explain. 
A. Limbus, B. Quator, C. Anterior to attachment of superior rectus, D. Behind rectus inseion
D: Behind rectus inseion
Answer: D: Behind rectus inseion 
Explanation: D i.e. Behind rectus inseion The sclera is thickest (1mm) at the posterior pole near the optic nerveQ and thinnest (0.3mm) just behind the inseion of rectus muscleQ.