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: Anatomy
Pterion is: 
Select and explain. 
A. Is a point of articulation of four skull bones, B. It is a point where 'bregma' and 'lamba' meet, C. It is region of the postero-lateral fontanelle merge, D. Lies deep to the zygomatic arch
A: Is a point of articulation of four skull bones
Answer: A: Is a point of articulation of four skull bones 
Explanation: Pterion is the area in the temporal fossa where 4 bones (frontal, parietal, temporal and sphenoid) adjoin each other forming an H-shaped suture.’