Final answer:
All imaging agents listed, Tl-201 chloride, I-131 MIBG, and Tc99m sestamibi, are used for the imaging of neoplasms, as they can highlight different organs and tissues based on radioactive isotope uptake.
Step-by-step explanation:
The agents used for the imaging of neoplasms (tumors) include Tl-201 chloride, I-131 MIBG, and Tc99m sestamibi. Tl-201 chloride and I-131 MIBG are both utilized in particular scenarios such as imaging of the heart and thyroid or for certain brain tumors, liver tumors, and conditions like Graves' disease. Tc99m sestamibi, as a part of 99m Tc compounds which are employed in about 80% of all radiopharmaceutical procedures, is also used for imaging the skeleton, heart, lungs, and kidneys due to its advantageous characteristics like emitting a single 0.142-MeV gamma ray and having a short 6-hour half-life to limit radiation exposure to the patient. Therefore, the correct answer is d. All of the above.