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
Most important function of albumin in body is 
Select and explain. 
A. Oncotic pressure, B. Drug transport, C. Toxic transport, D. Coagulation
A: Oncotic pressure
Answer: A: Oncotic pressure 
Explanation: Osmotic pressure is determined by the number of molecules dissolved in a fluid rather than by the mass of these molecules. Therefore, when corrected for number of molecules rather than mass, the following chart gives both the relative mass concentrations (g/dl) of the different types of proteins in normal plasma and their respective contributions to the total plasma colloid osmotic pressure (Πp).