Which of the following plasma proteins functions by maintaining the colloidal osmotic pressure?

Albumin produced only in the liver is the major plasma protein that circulates in the bloodstream. One of the functions of albumin is to maintain intravascular oncotic (colloid osmotic) pressure. To facilitate movement of fluid throughout the body the average capillary pressure is 15 to 25 mm Hg, greater at the arterial end than at the venous end. Serum albumin carries and delivers important nutrients to cells. It binds toxins to avoid toxic effects, binds excessive proteins to act as a buffer and binds hormones and growth peptides to keep them stable.