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
[{'content': 'Which of the following immunoglobulin is responsible for opsonisation - \nSelect and explain. \nA. Ig A, B. Ig G, C. Ig M, D. Ig E', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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>", 'role': 'assistant'}]