The cell reaction of a cell is <br> $Mg_{(s)} + Cu^{2+}_{(aq)} \to Cu_{(s)} + Mg^{2+}_{(aq)}$ <br> If the standard reduction potentials of magnesium and copper are $-0.33$ and $+2.38\; V$ respectively, the e.m.f of the cell is:

Question

( A ) $-2.03\;V$
( B ) $+2.03\;V$
( C ) $-2.71\;V$
( D ) $+2.71\;V$