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
Injection of hypeonic saline in which region of hypothalamus produces intense thirst: 
Select and explain. 
A. Posterior region, B. Paraventricular, C. Preoptic, D. Supraoptic
C: Preoptic
Answer: C: Preoptic 
Explanation: C i.e. Preoptic