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: Pharmacology
General anaesthetic most likely to cause bronchodilation is 
Select and explain. 
A. Thiopentone, B. Ketamine, C. Propofol, D. Fentanyl
B: Ketamine
Answer: B: Ketamine 
Explanation: None