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
Equilibrium potential of Cl- ions ? 
Select and explain. 
A. + 60 mV, B. +90 mV, C. -90 mV, D. -70 mV
D: -70 mV
Answer: D: -70 mV 
Explanation: Ans. is d i.e., -70 mV