Which of the coordination compounds [(i) to (v)] are used for the following processes :

A: Electroplating

B: Removal of excess copper from human body

C: Estimation of hardness of water

(i) DMG (ii) $\mathrm{Na}_2 \mathrm{EDTA}$ (iii) Cis-platin (iv) D-penicillamine (v) $\mathrm{K}\left[\mathrm{Au}(\mathrm{CN})_2\right]$

Which one of the following structures in Column I does not have the correct IUPAC name as given in Column II.

S.No.	Structure		IUPAC name
A.	$\left[\mathrm{CoBr}_2(\mathrm{en})_2\right] \mathrm{Cl}$	P.	Dibromidodi-( ethan-1, 2 - diamine)cobalt (III) chloride
B.	$\mathrm{Na}\left[\mathrm{PtBrCl}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)\right]$	Q.	Sodium amminebromidochloridonitrito- N - palatinate(II)
C.	$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}\right] \mathrm{SO}_4$	R.	Tetraamminediaquachloridochromium (III) sulphate.
D.	$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{PtCl}_4\right]$	S.	Tetraammineplatinum (II) tetrachloridoplatinate (II)

A transition metal M forms 4 homoleptic octahedral coordination compounds, $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and D of the type $\left[\mathrm{MX}_6\right]^{z-}$ with monodentate ligands a, b, c and d respectively. These compounds absorb red. blue. yellow and blue-green light respectively. Which one of the options shows the correct order of decreasing ligand strength?

Choose the coordination compound which does not exhibit Optical activity.