The correct statement among the following is

$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is pyramidal and more basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$

$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is planar and more basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$

$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is pyramidal and less basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$

$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is planar and less basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$