London dispersion forces are the only forces present in noble gases and thus the correct option is helium. Â
London force is an intermolecular force which occurs between an atoms or molecules which are polar or non-polar and another atom or molecule which are polar or non-polar. Hence it occurs between all molecules or atoms. The London dispersion force is a temporary attractive force which cause due to temporary dipoles of electrons in two adjacent atoms. This is also known as induced dipole-induced dipole attraction. Â It is a weakest Intermolecular force.
therefore the correct option is C.