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: ENT
Inverted papilloma -a) Is common in children b) Arises from lateral wallc) Always benignd) Can be premalignante) Causes obstruction 
Select and explain. 
A. abc, B. ade, C. ace, D. bde
D: bde
Answer: D: bde 
Explanation: None