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
CO2 content in aerial blood is 
Select and explain. 
A. 19ml/dl, B. 29ml/dl, C. 36ml/dl, D. 49 ml/dl
D: 49 ml/dl
Answer: D: 49 ml/dl 
Explanation: Approximately 49 mL of CO2 in each deciliter of aerial bloodRef: Ganong's Review of Medical Physiology Twenty-Third Edition Page No: 613