This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Physiologically inactive form is \nSelect and explain. \nA. Angiotensin I, B. Angiotensin II, C. Angiotensin III, D. Angiotensin IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Angiotensin I(Ref: Ganong, 25th ed/p.696)Angiotensin II & III got physiological activitiesAngiotensin I is only the precursor of Angiotensin II', 'role': 'assistant'}]