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': 'True is all except \nSelect and explain. \nA. Renin - liver, B. Renin- kidney, C. Renin substrate - liver, D. ACE- lung endothelium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Renin - liver', 'role': 'assistant'}]