This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Which of the following immunoglobulin is responsible for opsonisation - 
Select and explain. 
A. Ig A, B. Ig G, C. Ig M, D. Ig E
C: Ig M
Answer: C: Ig M 
Explanation: The unique structural features of IgM appear paicularly suited to the biological role of providing protection against microorganism and other large antigens that have repeating antigenic determinants on their surface. - IgM is also 500-1000 times more effective than IgG in opsonization, 100 times more effective in bactericidal action and about 20 times in bacterial agglutination. Reference : Anathanarayan & paniker's 9th edition, pg no:98 <\p>