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': 'Equilibrium potential of Cl- ions ? \nSelect and explain. \nA. + 60 mV, B. +90 mV, C. -90 mV, D. -70 mV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d i.e., -70 mV', 'role': 'assistant'}]