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: Dental
Fluoride is carried in the blood via: 
Select and explain. 
A. Plasma, B. RBC'S, C. Both plasma & RBC, D. WBC'S
C: Both plasma & RBC
Answer: C: Both plasma & RBC 
Explanation: None