The pair in which both species have same magnetic moment (spin only value) is .

Options

A. `[Mn(H_2O_6)]^(2+) and [Cr(H_2O]^(2+)`
B. `[Cr(H_2O_6]^(2+) and [Fe(H_2O)_6]^(2+)`
C. `[Co(OH)_4]^(2-) and [Fe(NH_3)_6]^(2+)`
D. `[Cr(H_2O)_6]^(2+) and [CoCl_4]^(2-)`