For the electro chemical cell

$\mathrm{M}\left|\mathrm{M}^{2+}\right||\mathrm{X}| \mathrm{X}^{2-}$

If $\mathrm{E}_{\left(\mathrm{M}^{2+} / \mathrm{M}\right)}^0=0.46 \mathrm{~V}$ and $\mathrm{E}_{\left(\mathrm{x} / \mathrm{x}^{2-}\right)}^0=0.34 \mathrm{~V}$.

Which of the following is correct?

1. A $\mathrm{E}_{\mathrm{cell}}=0.80 \mathrm{~V}$
2. B $\mathrm{M}+\mathrm{X} \rightarrow \mathrm{M}^{2+}+\mathrm{X}^{2-}$ is a spontaneous reaction
3. C $\mathrm{E}_{\text {cell }}=-0.80 \mathrm{~V}$
4. D $\mathrm{M}^{2+}+\mathrm{X}^{2-} \rightarrow \mathrm{M}+\mathrm{X}$ is a spontaneous reaction Correct answer