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: Biochemistry
Colloidal osmotic pressure of plasma is by 
Select and explain. 
A. Albumin, B. Fibrinogen, C. Globulin, D. Prothrombin
A: Albumin
Answer: A: Albumin 
Explanation: None