This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Equilibrium potential of calcium is \nSelect and explain. \nA. -32mV, B. +65mV, C. -95mV, D. +130mV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Applying the Nernst equation to external and internal calcium concentrations of 2.5 mM and 0.0001 mM, respectively, results in an equilibrium potential of +134 mV as shown below. (Ref: www.cvphysiology.com)', 'role': 'assistant'}]