Which pure compounds form intermolecular hydrogen bonds?

(P) $\mathrm{HF}$ (Q) ${\mathrm{H}}_{\mathrm{S}}\mathrm{S}$ (R) ${\mathrm{CH}}_4$

Due to the dipole-dipole forces, HF is a polar molecule. F is the limit for hydrogen. Hydrogen can form bonds. This means that only P can create intermolecular hydrogen bonds.