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: Pharmacology
Nitrous oxide is carried in the blood stream by 
Select and explain. 
A. Haemoglobin, B. White blood cells, C. Red Blood cells, D. Serum
C: Red Blood cells
Answer: C: Red Blood cells 
Explanation: None