This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
Tidal volume in a normal man at rest is 
Select and explain. 
A. 0.5 L, B. 1L, C. 1.5 L, D. 2 L
A: 0.5 L
Answer: A: 0.5 L 
Explanation: Normal tidal volume is 500 ml Ref: guyton and hall textbook of medical physiology 12 edition page number:324,325,326