The coordination number and the oxidation state of the element 'E' in the complex $[E(en)_2(C_2O_4)]NO_2$ when 'en' is ethylenediamine

Question

$(a)\;6\;and\;2\qquad(b)\;4\;and\;2\qquad(c)\;4\;and\;3\qquad(d)\;6\;and\;3$