What types of intermolecular forces are exerted by ${\mathrm{CH}}_3\mathrm{Cl}$ molecules in the liquid phase?

(P) Dipole-dipole forces (Q) Hydrogen bonding (R) London dispersion forces

London dispersion forces are present in all types of molecules, whether polar or non-polar. Consequently, the intermolecular forces that will exist in ${\mathrm{CH}}_3\mathrm{Cl}$ Regarding London forces (because these forces exist in every molecule) and dipole-dipole forces. Thus, both Q and R are correct.