According to V.B. theory, the bonds in methane are formed due to the overlapping

 In CH₄ molecule 2s and 2p orbitals of carbon are used in bonding with $4\mathrm{H}$ atoms to form the methane molecule. 2s orbital of carbon forms 1 bond with 1 hydrogen atom and three 2p orbitals of carbon form 3 bonds with 3 hydrogen atoms. So, $1\sigma s-s$ and $3\sigma s-p$ bonds are created.