# If an earthworm is left in 90% KOH solution for a long time,which part of it would be left undissolved:-

$\begin{array}{1 1}(A)\;\text{Setae}\\(B)\;\text{Spermatheca}\\(C)\;\text{Sand particles}\\(D)\;\text{Circular muscles}\end{array}$

Setae is made up of chitin. KOH dissolves chitin. Setae can be isolated
Hence (A) is the correct answer.
answered May 7, 2014
edited Dec 4, 2017

A , setae of the earthworm
answered Jan 11, 2017