Which of the following reagents would distinguish $\mathrm{cis}$-cyclopenta-1,2-diol from the $\mathrm{trans}-\mathrm{isomer}$?

• A

  ${\mathrm{MnO}}_2$

• B

  $\mathrm{Aluminium} \mathrm{isopropoxide}$

• C

  $\mathrm{Acetone}$

• D

  Ozone