In chlorobenzene, the `-Cl` group

In chlorobenzen, the - Cl group :

Chlorobenzene is

Chlorobenzene is .

Chlorobenzene is -

Assertion (A) : It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chlorobenzene in comaparision to that in chloroethane. Reason (R) : Chlorine-carbon (C-Cl) bond in chlorobenzene has partial double bond character due to resonance.

How does chlorobenzene react with : Cl_2 .