<prompt> In radionuclide imaging the most useful radio pharmaceutical for skeletal imaging is:Gallium 67 67GaTechnetium-sulphur-colloid 99mTc-ScTechnetium-99m 99mTcTechnetium-99m linked to Methylene dis-phos-phonate 99mTc-MDP  <response>: Ans. Technetium-99m linked to Methylene dis-phos-phonate 99mTc-MDP 