# The shape of methyl cation $(CH_3)^+$ is

$\begin{array}{1 1}(a)\;\text{Pyramidal}\\(b)\; \text{Trigonal planar}\\(c)\;\text{Tetrahedral}\\(d)\;\text{See-saw}\end{array}$

Methyl cation in trigonal planar shape.
Hence (b) is the correct answer.