What is hybridisation of O in H_2 O ?

In gaseous state, water exists as discrete $\mathrm{H}_2 \mathrm{O}$ molecule, in which the central $O$ atom contains four $\mathrm{sp}^3$-hybridised orbitals. Two of which are half - filled and used in over lapping with 1s orbital of H -atom to given two $\mathrm{sp}^3-\mathrm{s}, \mathrm{O}-\mathrm{H}, \sigma$-bond while the remaining two exist as lone pair. The geometry of the molecule is angular or V -shape.