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
When NaCl is injected in the internal carotid artery, it causes release of ADH by acting on? 
Select and explain. 
A. Paramedian nucleus, B. Anterior pituitary, C. Paraoptic nucleus, D. Supraoptic nucleus
D: Supraoptic nucleus
Answer: D: Supraoptic nucleus 
Explanation: Osmoreceptors located in the anterior hypothalamus (preoptic nucleus), which are stimulated by NaCl injection (increase osmo­lality). Osmoreceptors have stimulatory action on thirst centre and ADH secreting supraoptic nucleus.