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
Resting membrane potential depends mainly on 
Select and explain. 
A. K, B. Na, C. Cl, D. HCO3
A: K
Answer: A: K 
Explanation: Since K+ permeability is greater than Na+ permeability, therefore, K+ channels maintain the RMP.(Ref: Textbook of physiology AK Jaun 5th edition Page no.35)