Which intermolecular force acts between two non-polar molecules?

1. A non-polar molecule has its charge spread evenly and carries no permanent dipole. 2. At any instant the moving electrons can still sit unevenly, giving a temporary dipole. 3. Induced dipole forces exist between two non-polar molecules for exactly this reason. 4. Ion-dipole forces need an ion and a polar molecule, so neither partner here would qualify. _Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 4: Intermolecular forces_