The correct option is A Fibrinogen
Globulin, albumin and fibrinogen are the major blood proteins.
Fibrinogen is a glycoprotein in vertebrates, that helps in the formation of blood clots. It is produced by liver.
Albumin helps keep the blood from leaking out of the blood vessels.
Globulin are made up of different proteins, called alpha, beta and gamma types. Some bind with hemoglobin. Others transport metals (iron) in the blood to fight infections.
Thus, the correct answer is option (A).