The attractive forces between polar molecules are ________ forces and between non-polar molecules are ______ forces.

The correct option is A dipole-dipole, London
The intermolecular attractive forces between two polar molecules would be dipole-dipole interactions.
The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction. London forces are the attractive forces that cause non-polar substances to condense to liquids and to freeze into solids when the temperature is lowered sufficiently.

Hence, the correct option is $A.$