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
[{'content': 'All of the following causes relaxation of mesangial cells except \nSelect and explain. \nA. CAMP, B. Dopamine, C. PGF2, D. ANP', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PGE2,ANP,CAMP,Dopamine cause relaxation of mesangial cells.', 'role': 'assistant'}]