Among the following compounds, the one that is polar and has central atom with sp2 hybridization is

H2CO3  and  BF3 have  sp2 hybridization while SiF4 and   HClO2  have  sp3 hybridization. But in BF3 it is symmetrical so dipole moment is zero while in H2CO3 resultant dipole is not zero so it is also polar.