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: Physiology
Which one of the following substances, actively transported by the tubular cells, has the highest Tubular Transport Maximum 
Select and explain. 
A. Plasma protein, B. Haemoglobin, C. Glucose, D. Sodium
C: Glucose
Answer: C: Glucose 
Explanation: Transport Maximum (Tm)
Glucose- 375mg/min
Plasma proteins- 30mg/min
Na+- No transport maximum