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': 'Osmoreceptor is located at which site - \nSelect and explain. \nA. Anterior hypothalamus, B. Renal medulla, C. Carotid body, D. Atrial chamber', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Anterior hypothalamus', 'role': 'assistant'}]