The coordination compound with the molecular formula $[CO(NO_2)(SCN)(en)_2]Br$ exhibits which of the following types of isomerism?

Given below are two statements:
Statement-$I$: $[Fe(ox)_3]^{3-}$ is chiral.
Statement-$II$: $trans-[Cr(H_2O)_2(ox)_2]^-$ is chiral.
(Given: $oxH_2 = HOOC-COOH$)
In light of the above statements, choose the most appropriate answer from the options given below:

The number of isomers possible for the complex $K_2[PtClBr_2(SCN)]$ is:

Which of the following compounds does not exhibit paramagnetism?

Which of the following compounds shows optical isomerism?

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ The spin only magnetic moment value for $[Fe(CN)_6]^{3-}$ is $1.74 \ BM$,whereas for $[Fe(H_2O)_6]^{3+}$ is $5.92 \ BM$.
Reason $R:$ In both complexes,$Fe$ is present in $+3$ oxidation state.
In the light of the above statements,choose the correct answer from the options given below: