Correct Answer - C

( c) Magnetic moments `sqrt(n(n + 2)) B.M` where `n` is the number of unpaired electron.

`V(Z = 23) (Ar) 3 d^3 4 s^2 n = 3, sqrt15 BM = x`

`Cr(Z = 24) (Ar) 3 d^5 4 s n = 6, sqrt48 BM = y`

`Mn (Z = 25) (Ar) 3 d^5 4 s^2 n = 5, sqrt35 BM = z`.