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: Surgery
Schneiderian membrane is: 
Select and explain. 
A. Stratified squamous epithelium., B. Pseudostratified cilliated columnar epithelium., C. Stratified columnar epithelium., D. Stratified cilliated columnar epithelium.
B: Pseudostratified cilliated columnar epithelium.
Answer: B: Pseudostratified cilliated columnar epithelium. 
Explanation: None