Which of the complexes has the magnetic moment of $$3.87\ \mathrm{B.M.}$$?

A

$$[\mathrm{Co(NH_3)_6}]^{3+}$$

B

$$[\mathrm{CoF_6}]^{3-}$$

C

$$[\mathrm{CoCl_4}]^{2-}$$

D

$$[\mathrm{Co(dmg)_2}]$$ square planar complex (dmg = dimethyl glyoxime)