Which one has minimum (nearly zero) dipole moment?

The dipole moment is zero for the molecule:

Number of compounds/species from the following with non-zero dipole moment is. . . . . . $BeCl_2, BCl_3, NF_3, XeF_4, CCl_4, H_2O, H_2S, HBr, CO_2, H_2, HCl$

Explain the relationship between the polarity of a polyatomic molecule and the polarity of its bonds.

$A$ neutral molecule $XF_3$ has a zero dipole moment. The element $X$ is most likely

Which one of the following molecules has a zero dipole moment?