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
Resting membrane potential in cardiac muscle ? 
Select and explain. 
A. -70 mV, B. +70 mV, C. -90 mV, D. +90 mV
C: -90 mV
Answer: C: -90 mV 
Explanation: Ans. is 'c' i.e., -90 mVNormal RMP in myocardial fibers is about -90 mV.