Which of the following statements about ammonium cerium(IV) nitrate, $$(\mathrm{NH_4})_2[\mathrm{Ce(NO_3)_6}]$$, is false?

A

$$\mathrm{NO_3^-}$$ acts as a monodentate ligand

B

The Ce atom has a coordination number of 12

C

The shape of the complex ion is icosahedron

D

The solution is used as an oxidizing agent