The correct order of increasing hydration energy of the following conjugate bases of oxoacids of bromine is

• Correct answer
  A

  $\mathrm{B}\mathrm{r}{\mathrm{O}}_4^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_3^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_2^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}^{-}$
• B

  $\mathrm{B}\mathrm{r}{\mathrm{O}}_4^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_3^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_2^{-}$
• C

  $\mathrm{B}\mathrm{r}{\mathrm{O}}_3^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_4^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_2^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}^{-}$
• D

  $\mathrm{B}\mathrm{r}{\mathrm{O}}^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_2^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_3^{-}<\mathrm{B}\mathrm{r}{\mathrm{O}}_4^{-}$

Hence, the correct answer is option: 'A'.