d
\((a) \,H_2....... H_2O\) Dipole-induced dipole interaction (van der Waals' force) energy \(< 8\, kJ/mol\)
\((b)\, H-Cl..... H-Cl\) Dipole-dipole interaction (van der Waals' force) \(< 8\, kJ/mol\)
\((c)\,F^- . . . . . HF\) Ion-dipole \(H-\) bond (very strong \(H-\) bond energy) \(> 42\, kJ/mol\)
\((d)\, HCN . . . . . NH_3\) \(H-\) bond energy ranges from \(8-42\, kJ/mol\)