This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
The most widely used treatment for recurrent respiratory papillomatosis nowadays is: 
Select and explain. 
A. CO2, LASER ablation, B. Diathermy excision, C. Excision with microdebrider, D. Wait for spontaneous resolution
A: CO2, LASER ablation
Answer: A: CO2, LASER ablation 
Explanation: (a) CO2 LASER ablation(Ref. Cummings, 6th ed., 923)Spontaneous resolution though may occur after puberty but is unpredictable. Moreover life threatening stridor may occur so CO2 LASER excision is to be done.Various excision techniques, most widely used method is CO2 LASER.