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': 'Benzodiazepines act preferentially on which part of the brain to block thought and mental functions? \nSelect and explain. \nA. Hypothalamus, B. Thalamus, C. Limbic System, D. Area Postrena', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]