This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plastic Surgery and Skin Lesions, Subject name: Surgery
Operation theatre fire is most commonly due to:- 
Select and explain. 
A. Argon beam coagulation, B. Lasers, C. Fibre optic illumination, D. Electrosurgical equipment
D: Electrosurgical equipment
Answer: D: Electrosurgical equipment 
Explanation: ECRI's analysis of case repos show that the most common ignition sources are electrosurgical instruments (68%) & lasers(13%). Most common fire location is airway(35%), head or face(28%), & elsewhere on or inside the patient (38%). An oxygen enriched atmostphere was a contribution factor in (74%) of all cases.