Which of the following compounds is likely to have a dipole moment?

The 3-dimensional structures of the four compounds are shown below.
Each of H₂C=CH₂ and SF₆ does not have a dipole moment because the dipole moments of the bonds cancel each other.
Each of CHCl₃ and CH₂Cl₂ has a dipole moment because the dipole moments of the bonds cannot cancel each other.

The answers: CHCl₃ and CH₂Cl₂