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
All the following instruments are required for tonsillectomy except: 
Select and explain. 
A. Coblation wand, B. Bipolar cautery, C. Microdebrider, D. Harmonic scalpel
C: Microdebrider
Answer: C: Microdebrider 
Explanation: Ans: C. Microdebrider(Ref: Scott-Brown's 7Ie p3576; Cummings Pediatric Otolaryngology By Marci M. Lesperance, Paul W. Flint/p51; Dhingra 6/e p430)All these four instruments are used in different techniques of tonsillectomy.Microdebrider is less commonly used than others as it leaves behind a small amount of tissue covering theconstrictor muscle.Hence, preferred answer would be microdebrider.