This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative assessment and monitoring in anaesthesia, Subject name: Anaesthesia
[{'content': 'Preanaesthetic medication is used for all except \nSelect and explain. \nA. Decrease anaesthetic doe, B. Decrease blood pressure, C. Prevents aspiration, D. Produces amnesia for perioperative events', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Complications of Anaesthesia During anaesthesia: > Respiratory depression - Salivation, respiratory secretions > Cardiac arrhythmias > Fall in BP > Delirium and convulsion > Fire and explosion After anesthesia: Nausea and vomiting > Nerve palsies > Emergence delirium > Cognitive defects', 'role': 'assistant'}]