Why ICl bonds are weaker than $Cl_2$

Question

$\begin{array}{1 1} \text{(a) InterHalogen bonds are weaker than covalent bonds} \\ \text{(b) Ionic Bonds are Weaker than Covalent bond} \\ \text{(c) ICl bonds are stronger than $Cl_2$ bond} \\\text{(d) None of these} \end{array}$