This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Thinnest pa of the skull 
Select and explain. 
A. Lambdoid suture, B. Temporal pa of bone, C. Pterion, D. Occiput
C: Pterion
Answer: C: Pterion 
Explanation: The anterior pa of the floor of the temporal fossa is crossed by an H shaped suture where four bones,frontal,parietal,greater wing of sphenoid and temporal adjoin each other.This area is termed the pterion. REF.B D Chaurasia's Human Anatomy VOL.3,Fouh edition