Which of the following statement (S) is/are correct

I) Both B and Al forms anionic hydrides
II) Both forms Alkaline hydroxides of formula $\mathrm{M}{\left(\mathrm{OH}\right)}_3$ 
III) Both Boran and Al forms a series of polymeric Hydrides
IV)Both forms monomeric halides $\left({\mathrm{MX}}_3\right)$

• A

  I, IV

• B

  I,II,III

• C

  II, III

• D

  I II IV