The roof of the olfactory region is formed by ?: (A) Nasal bone, (B) Cribriform plate of ethmoid, (C) Sphenoid, (D) Temporal bone
Answer is B. Ans. is 'b' i.e., Cribriform plate of ethmoid The olfactory mucosa lines the upper one-third of nasal cavity including the roof formed by cribriform plate and the medial and lateral walls up to the level of superior concha (turbinate).