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
Repolarization is due to opening of which channels 
Select and explain. 
A. Na, B. HCO3, C. K, D. Cl
C: K
Answer: C: K 
Explanation: Repolarization is due to opening of voltage-gated K+ channels. (Ref: Textbook of physiology AK Jain 5th edition page no.36)