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: Biochemistry
[{'content': 'Shoest peptide. is: \nSelect and explain. \nA. Angiotensin-III, B. Vasopressin, C. Angiotensin-II, D. Angiotensin-I', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Angiotensin-III', 'role': 'assistant'}]