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
True regarding rennin angiotensin system is A/E 
Select and explain. 
A. Angiotonin is octapeptide, B. Renin splits Leucine- valine bond, C. Aspaic acid is essential for rennin activity, D. All
B: Renin splits Leucine- valine bond
Answer: B: Renin splits Leucine- valine bond 
Explanation: B i.e. Renin splits Leucine- valine bond