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
[{'content': 'Serotonin syndrome may be precipitated by all of the following medications, except: \nSelect and explain. \nA. Chlorpromazine, B. Pentazocine, C. Buspirone, D. Meperidine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Chlorpromazine is used in the treatment of serotonin syndrome. It is a potent 5HT2 receptor antagonist and can reduce the level of serotonin thereby useful in serotonin syndrome. Ref: The Diagnosis of Psychosis By Rudolf Cardinal, Edward Bullmore, Page 125; Blackwell's Five-Minute Veterinary Consult Clinical Companion, Page 234.", 'role': 'assistant'}]