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: Pediatrics
Laryngeal papilloma – 
Select and explain. 
A. Single, B. Multiple, C. Seen in children, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Laryngeal papilpoma

Most common benign tumor of larynx
Single or multiple irregular, wart like glottic masses.
HPV-6 & 11 may be the causative factor.
Treatment is with CO, laser ablation.
oc-IFN and indole - 3 - carbinole may also be used.