The cationic carbon of the methyl cation $\mathrm{CH}{}_3{}^{+}$ is best described as:

1. A$s{p}^3$ hybridised, pyramidal with a lone pair
2. B$s{p}^3$ hybridised, tetrahedral
3. C$s{p}^2$ hybridised, trigonal planar with an empty $p$ orbital
4. D$sp$ hybridised, linear