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
[{'content': 'Preanesthetic medication is used for A/E – \nSelect and explain. \nA. Decrease of anesthetic dose, B. Decrease BP, C. Prevent aspiration, D. Produce amnesia for peri-operative events', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Premedications are not used to decrease BP. They are used to the relief of anxiety, to decrease the dose of anaesthesia, to prevent aspiration, to decrease secretion & vagal stimulation, to produce perioperative amnesia, and to prevent post-operative nausea & vomiting.', 'role': 'assistant'}]