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 regarding rennin angiotensin system is A/E \nSelect and explain. \nA. Angiotonin is octapeptide, B. Renin splits Leucine- valine bond, C. Aspaic acid is essential for rennin activity, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Renin splits Leucine- valine bond', 'role': 'assistant'}]