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
[{'content': 'All of the following help in opsonisation except: \nSelect and explain. \nA. IgG, B. Lectin, C. C reactive protein, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chemicals causing opsonisation are called opsonins. These are:\n\nC3b.\nFc fragment of antibody or IgG.\nSome serum proteins (like fibrinogen, mannose binding lectin and C reactive protein)', 'role': 'assistant'}]