Which of the following is incorrect statement?

$\displaystyle \mathrm{PbF}_4$ is covalent in nature

$\displaystyle \mathrm{SiCl}_4$ is easily hydrolysed

$\displaystyle \mathrm{GeX}_4(\mathrm{X}=\mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I})$ is more stable than $\displaystyle \mathrm{GeX}_2$

$\displaystyle \mathrm{SnF}_4$ is ionic in nature