The correct order of $E_{M^{2+}/M}^{\circ }$ values with negative sign for the four successive elements $\text{Cr, Mn, Fe}$ and $\text{Co}$ is:

1. A
   $\text{Mn}>\text{Cr}>\text{Fe}>\text{Co}$
2. B
   $\text{Cr}>\text{Fe}>\text{Mn}>\text{Co}$
3. C
   $\text{Fe}>\text{Mn}>\text{Cr}>\text{Co}$
4. D
   $\text{Cr}>\text{Mn}>\text{Fe}>\text{Co}$