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: Anaesthesia
Bronchospasm is not caused by 
Select and explain. 
A. Regurgitation, B. Aspiration, C. Intubation, D. Halothane
D: Halothane
Answer: D: Halothane 
Explanation: D i.e. Halothane