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: Microbiology
Complement components are ? 
Select and explain. 
A. Lipoproteins, B. Glycoproteins, C. Polysaccharides, D. Lipid
B: Glycoproteins
Answer: B: Glycoproteins 
Explanation: Ans. is 'b' i.e., Glycoproteins The proteins and glycoprotiens that constitute the complement system are synthesized by hepatocytes" -- Internet "Most of the complement glycoproteins are synthesized predominantly by the liver, but macrophages and many other cell types are also sources of various complement components" - Medical immunology "Complement components are glycoproteins" -- Textbook of Human Blood Plasma Protiens