This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Normal QT interval is (in seconds) 
Select and explain. 
A. 0.12 - 0.20, B. 0.40 - 0.43, C. 0.08 - 0.10, D. None
B: 0.40 - 0.43
Answer: B: 0.40 - 0.43 
Explanation: QT interval 0.40 to 0.43Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:494