This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inhalational Anesthetic Agents, Subject name: Anaesthesia
All are risk factors for developing bronchospasm during anesthesia except- 
Select and explain. 
A. Perioperative respiratory infection, B. Endotracheal intubation, C. Presence of COPD, D. Old age
D: Old age
Answer: D: Old age 
Explanation: Risk factors for developing bronchospasm during anesthesia include young age (< 10 years), perioperative respiratory infection , Endotracheal Tube and COPD. use of supraglottic devise reduces risk of bronchospasm.