The pair of species having same value of spin only magnetic moment is

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$C r^{+ 3}, C o^{+ 2}$

$Z n^{+ 2}, T i^{+ 3}$

$M n^{+ 3}, N i^{+ 2}$

$F e^{+ 2}, T i^{+ 2}$

answer is C.

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Detailed Solution

Ions having same number of unpaired electrons is having same spin only magnetic moment

Ion	Electronic configuration of ion	number of unpaired electrons present in ion
$M n^{+ 3}$	3d⁴	4
$N i^{+ 2}$	3d⁸	2
$F e^{+ 2}$	3d⁶	4
$T i^{+ 2}$	3d²	2
$C r^{+ 3}$	3d³	3
$C o^{+ 2}$	3d⁷	3
$Z n^{+ 2}$	3d¹⁰	0
$T i^{+ 3}$	3d¹	1

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