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
Thirst is activated bya) Increased Angitension II levelb) Extracellular hyperosmolarityc) Increaed ANP levelsd)  Increased Renin levels 
Select and explain. 
A. acd, B. bcd, C. abd, D. ab
C: abd
Answer: C: abd 
Explanation: When plasma osmolarity increases, the Osmoreceptors are activated which results in increased thirst. Similarly, when hypovolemia occurs, Renin-Angiotensin mechanism gets activated which causes increase in Angiotensin II that stimulates the satiety centre.