Which one of the following complexes is paramagnetic?

Choose the correct code regarding the possible number of geometrical isomers exhibited by the following complexes:
$I. [CrCl_2(NO_2)_2(NH_3)_2]^-$
$II. [Co(NO_2)_3(NH_3)_3]$
$III. [PtCl(NO_2)(NH_3)(py)]$
$IV. [PtBrCl(en)]$
Select the correct sequence for $I - II - III - IV$.

Which of the following is an optically active isomer?

The total number of isomers for the square planar complex $K_2[PdClBr_2(SCN)]$ is/are:

Match List-$I$ with List-$II$ and select the correct answer using the codes given below:

List-$I$	List-$II$
$I. [FeF_6]^{3-}$	$A. 1.73 \ BM$
$II. [Ti(H_2O)_6]^{3+}$	$B. 5.93 \ BM$
$III. [Cr(NH_3)_6]^{3+}$	$C. 0.00 \ BM$
$IV. [Ni(H_2O)_6]^{2+}$	$D. 2.83 \ BM$
$V. [Fe(CN)_6]^{4-}$	$E. 3.88 \ BM$

Which of the following ions has the lowest magnetic moment?