Given below are two statements : Statement I: Group 13 trivalent...

In trivalent state most of the 13th group compounds being covalent are hydrolysed in water. Trichlorides of group 13 on hydrolysis in water form tetrahedral ${\left[M{\left(OH\right)}_{4}\right]}^{-}$ species, the hybridisation state of element $M$ is ${sp}^{3}$.

In case of aluminium, acidified aqueous solution forms octahedral ${\left[Al{\left({H}_{2}O\right)}_{6}\right]}^{3 +}$ ion, which has an aluminium as a central metal atom and water molecules as ligands. The aluminium is in $+ 3$ oxidation state and forms$6{sp}^{3}{d}^{2}$ hybrid orbitals. 

Hence option D is the answer.