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Bacteria present on the surface of the earthworm are destroyed by :-

$\begin{array}{1 1}(A)\;\text{Excretory substance secreted by nephridia}\\(B)\;\text{Coelomic fluid}\\(C)\;\text{Antibodies}\\(D)\;\text{Saliva}\end{array} $

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Coelomic fluid is excerated on the body surface to keep it moist.It contains enzymes like lysozyme which help kill bacteria.
Hence (B) is the correct answer.
answered May 7, 2014 by sreemathi.v

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