This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Sclera is thinnest at 
Select and explain. 
A. Near the optic nerve, B. At inseion of the extra ocular muscles, C. Around the limbus, D. Nasally
B: At inseion of the extra ocular muscles
Answer: B: At inseion of the extra ocular muscles 
Explanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 140) The thickest pa of the sclera - Near the optic nerve (at the posterior pole)The thinnest pa of the sclera- Near the inseion of extraocular muscles ref khurana 6th edition pg 566