Statement -1. A carbon atom having an sp hybrid orbitals is less electronegative than carbon atoms  possessing  $s{p}^2$ or  $s{p}^3$  hybridized orbitals.
Statement -2. The percentage of s-character increases then decreases the electronegativity character. 
Statement-3. Number of pure and hybrid orbitals in  $C{H}_4$ are equal.
Statement-4. All sigma bonds in  $C_2{H}_6$ are formed due to only one type of overlapping of orbitals.