Which molecule has no permanent dipole moment?

The molecule having permanent dipole moment is

The molecule having permanent dipole moment is

Which molecule has the largest dipole moment?

Which molecule has the largest dipole moment?

Which of the following pair of molecules will have permanent dipole moment?

Which of the following pair of molecules will have permanent dipole moment?

_____ interaction takes place between a polar molecule having permanent dipole moment and nonpolar molecule with zero dipole moment.