$C{r}^{+2}$  and  $M{n}^{+3}$  both have $d^4$ configuration thus

both are reducing agents 

$C{r}^{+2}$ is an oxidising agent while $M{n}^{+3}$  is reducing agent 

both are oxidising agent

$M{n}^{+3}$  is an oxidising agent while $C{r}^{+2}$  is reducing agent