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
If intracellular  is 15 mM and the extracellular  is 150mM, what is the equilibrium potential for 
Select and explain. 
A. –69mV, B. +90mV, C. +60mV, D. –90mV
C: +60mV
Answer: C: +60mV 
Explanation: None