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
AV nodal delay is 
Select and explain. 
A. 0.2 sec, B. 0.13 sec, C. 0.01 sec, D. 0.3 sec
B: 0.13 sec
Answer: B: 0.13 sec 
Explanation: AV nodal delay- 0.10 to 0.13 sec