This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear Medicine, Subject name: Radiology
In radionuclide imaging, the most useful pharmaceutical agent for skeletal imaging is___: 
Select and explain. 
A. Gallium 67, B. Technetium 99 linked to MDP, C. Technetium-Sulphur colloid, D. Technetium 99m
B: Technetium 99 linked to MDP
Answer: B: Technetium 99 linked to MDP 
Explanation: Ans. B. Technetium 99 linked to MDPMDP (Methyl diphosphonate) adsorbs into the hydroxyapatite crystals and gets accumulated in the areas of active bone formation which can be detected by nuclear imaging.