Match the ions given in Column I with their characteristic properties given in Column II.

S.No.	Column I	S.No.	Column II
A	\(Cr^{2+}\)	P	Stable in aqueous medium and has magnetic moment equal to 5.92 BM.
B	\(Cu^+\)	Q	Only stable oxidation state and does not act as reducing agent.
C	\(Mn^{2+}\)	R	Is a good reducing agent due to attainment of stable \(d^3\) configuration.
D	\(Sc^{3+}\)	S	Unstable in aqueous medium and readily disproportionates.

1. A \(\mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{S}\) \(\quad \mathrm{C}=\mathrm{P}\) \(\quad \mathrm{D}=\mathrm{Q}\)
2. B \(A=Q\) \(\quad B=P\) \(\quad \mathrm{C}=\mathrm{S}\) \(\quad D=R\)
3. C \(A = S\) \(\quad B=R\) \(\quad \mathrm{C}=\mathrm{P}\) \(\quad D=Q\)
4. D \(A=S\) \(\quad B=R\) \(\quad C=Q\) \(\quad \mathrm{D}=\mathrm{P}\)