A complex has the empirical formula ${\mathrm{CoCl}}_3·6{\mathrm{H}}_2\mathrm{O}.$ Which of the following statement(s) is/are correct?

Compound

$\mathrm{P}:\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4{\mathrm{Cl}}_2\right]\mathrm{Br}·2{\mathrm{H}}_2\mathrm{O}$

$\mathrm{Q}:\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4{\mathrm{Br}}_2\right]\mathrm{Cl}·2{\mathrm{H}}_2\mathrm{O}$

$\mathrm{R}:\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{Cl}\right]{\mathrm{Br}}_2·1{\mathrm{H}}_2\mathrm{O}$

$\mathrm{S}:\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{Cl}}_3$

Incorrect statement(s) are:

Select the incorrect statement(s)

Select optically active complex(es):

Note: Solution corrected from that of book.