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: Physiology
[{'content': 'Chemoreceptor Trigger Zone is: \nSelect and explain. \nA. Pons, B. Lateral hypothalamus, C. Ventral hypothalamus, D. Area postrema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Area postrema', 'role': 'assistant'}]