Which of the following set of species are coloured as well as diamagnetic?

(P) $\left[{\mathrm{Cl}}_2\text{ and }{\mathrm{Br}}_2\right]$

{Q) $\left[\mathrm{AgBr}\text{ and }\mathrm{AgI}\right]$

(R) $\left[{\mathrm{Na}}_2\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]\text{ and }\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5{\mathrm{NO}}_3{\mathrm{SO}}_4\right]\right.$

(S) $\left[{\mathrm{Na}}_2\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]\text{ and }{\mathrm{Na}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NOS}\right]\right]$

In case of $\left[{\mathrm{Cl}}_2\text{ and }{\mathrm{Br}}_2\right]$ LMCT takes place because of which it shows intense color, although it has no unpaired electrons for d-d transition, it is diamagnetic.

Hence correct option is A.