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: Pathology
All of the following help in opsonisation except: 
Select and explain. 
A. IgG, B. Lectin, C. C reactive protein, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Chemicals causing opsonisation are called opsonins. These are:

C3b.
Fc fragment of antibody or IgG.
Some serum proteins (like fibrinogen, mannose binding lectin and C reactive protein)