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

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

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.