# In pheretima clitellum is primarily concerned with :-

$\begin{array}{1 1}(A)\;\text{Storing sperms}\\(B)\;\text{Cocoon formation}\\(C)\;\text{Copulation}\\(D)\;\text{None of these}\end{array}$

In pheretima clitellum is primarily concerned with cocoon formation
Hence (B) is the correct answer.