The coordination number and the oxidation state of the element 'E' in the complex $\left[\mathrm{E}{\left(\mathrm{en}\right)}_2\left({\mathrm{C}}_2{\mathrm{O}}_4\right)\right]{\mathrm{NO}}_2$ (where (en) is ethylenediamine) are, respectively:

• A

  6 and 2

• B

  4 and 2

• C

  4 and 3

• D

  6 and 3