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
Osmoreceptor is located at which site 
Select and explain. 
A. Anterior hypothalamus, B. Renal medulla, C. Carotid body, D. Atrial chamber
A: Anterior hypothalamus
Answer: A: Anterior hypothalamus 
Explanation: None