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
All are false about propofol except 
Select and explain. 
A. Propofol causes malignant hyperthermia, B. Propofol infusion at rate >4mg/hr causes propofol infusion syndrome, C. Propofol is the best bronchodilator, D. Propofol is cardiovascular stable drug
B: Propofol infusion at rate >4mg/hr causes propofol infusion syndrome
Answer: B: Propofol infusion at rate >4mg/hr causes propofol infusion syndrome 
Explanation: Propofol is bronchodilator, but ketamine is the best among all anaesthetic agents. Propofol has myocardial depressant action. i.v anaesthetic agents do not cause malignant hyperthermia.