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
[{'content': 'Resting membrane potential of skeletal muscle is equal to equilibrium potential of ______ \nSelect and explain. \nA. Na+, B. Cl-, C. K+, D. Ca2+', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Resting membrane potential of skeletal muscle, cardiac muscle is equal to equilibrium potential of K. Both measures 90mV', 'role': 'assistant'}]