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
The roof of the olfactory region is formed by? 
Select and explain. 
A. Nasal hone, B. Cribriform plate of ethmoid, C. Sphenoid, D. Temporal bone
B: Cribriform plate of ethmoid
Answer: B: Cribriform plate of ethmoid 
Explanation: Roof of olfactory region of nasal cavity is formed by cribriform plate of ethmoid boneQ.Other bones paicipating in non- olfactory roof formation are body of sphenoid, frontal bone, nasal bone and nasal cailages.