# Opsonins are:
A. C3a
B. IgM
C. Carbohydrate binding proteins
D. Selectins
The correct answer is C. Carbohydrate binding proteins.
Opsonins
• Chemicals causing opsonisation
• They are specific carbohydrate binding proteins
Examples of opsonins
• C3b
• Fc fragment of antibody or IgG
• Some serum proteins (like fibrinogen, mannose binding lectin and C reactive protein)
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