Step 1: Understand tetrahedral geometry.
In tetrahedral geometry, four equivalent orbitals arrange themselves to minimize repulsion.
Step 2: Hybridisation involved.
One \(s\) orbital and three \(p\) orbitals hybridise to form four equivalent \(sp^3\) hybrid orbitals.
Step 3: Conclusion.
Hence, \(sp^3\) hybridisation results in tetrahedral geometry.