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: Anatomy
[{'content': 'Hormone involved in regulation of BP ? \nSelect and explain. \nA. Serotonin, B. Angiotensin- II, C. Dopamine, D. Prostaglandin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Angiotensin- II", 'role': 'assistant'}]