The spin only magnetic moment ${\left[\mathrm{Mn}{\left(\mathrm{Br}\right)}_4\right]}^{2-}$ is 5.9BM. Then possible hybridization of Mn in the complex is

• A

  $s{p}^{3}d$

• B

  $ds{p}^2$

• C

  $d^{2}s{p}^3$

• D

  $s{p}^3$