<prompt> In Radionuclide imaging the most useful radio pharmaceutical for skeletal imaging is -Gallium 67Technetium-sulphur-colloidTechnetium-99mTechnetium-99m linked to Methylene disphosphonate  <response>: Ans. is d i.e., Technetium-99m linked to Methylene disphosphonate 99mTc-MDP o Tc 99 is the most common radiopharmaceutical used for imaging in nuclear medicine. For skeletal imaging Diphosphonate Ligands are used as these agents are deposited on sites of actively growing bone. The diphosphonate ligand has a high affinity for actively growing bone. 99Tc-MDP is the most widely used of the diphosphonate ligands- Bone Scintigraphy.RadiopharmaceuticalPrimary useTc-99m Medronate MDP most commonBone imagingTc-99m Oxidronate HMDPBone imagingTc-99m HEDPBone imagingTc-99m ApcitidePeptide imaging of DVTTc-99m ArcitumomabMonoclonal antibody for colorectal cancerTc-99m albumin colloidImaging of RES liverspleenTc-99m bicisate ECDCerebral perfusion imagingTc-99m DepreotideSomatostatin receptor-bearing pulmonary massesTc-99m disofenin DISJDAHepatobiliary imagingTc-99m exametazine HMPAOCerebral perfusion imagingTc-99m GluceptateRenal imagingTc-99m Human Serum Albumin HSAImaging of cardiac chambersTc-99m Lidofenin HIDAHepatobiliary imagingTc-99m Macroaggregated Albumin MAAPulmonary perfusionTc-99m MebrofeninHepatobiliary imagingTc-99m MertiatideRenal imagingTc-99m nofetumomab Merpentan NR-LU-10Monoclonal antibody Fab fragment for imaging small cell lung cancerTc-99m Pentetate DTPARenal imaging and function studies; radioaerosol ventilation imagingTc-99m Pyrophosphate PYPAvid infarct imagingTc-99m Red Blood Cells RBCsImaging of GI bleeds, cardiac chambersTc-99m SestamibiMyocardial perfusion imaging ; breast tumor imagingTc-99m Succimer DMSARenal imagingTc-99m Sulfur Colloid SCImaging of RES liverspleen, gastric emptying, GI bleedsTc-99m TeboroximeMyocardial perfusion imagingTc-99m TetrofosminMyocardial perfusion imaging 