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
All of the following causes relaxation of mesangial cells except 
Select and explain. 
A. CAMP, B. Dopamine, C. PGF2, D. ANP
C: PGF2
Answer: C: PGF2 
Explanation: PGE2,ANP,CAMP,Dopamine cause relaxation of mesangial cells.