Glycocalyx of a bacterial cell may occur in the form of a loose sheath called _______ or it may be thick and tough called ______.

Question

$\begin{array}{1 1} a.Capsule, slime \;layer\\ b.Slime \;layer, capsule\\ c.Mesosome, Capsule\\ d.Mesosome, slime layer \end{array} $