Nitration of the following takes place in the order :

• A

  $\mathrm{I}<\mathrm{II}<\mathrm{III}$

• B

  $\mathrm{II}<\mathrm{I}<\mathrm{III}$

• C

  $\mathrm{I}<\mathrm{III}<\mathrm{II}$

• D

  $\mathrm{III}<\mathrm{I}<\mathrm{II}$