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: Unknown
[{'content': 'RMP of smooth muscle is? \nSelect and explain. \nA. -50mv, B. -75mv, C. -90mv, D. -35mv', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans- A', 'role': 'assistant'}]