Unnatural radionuclides have applications in which fields?

• A. They occur naturally only.
• B. They are used in nuclear medicine and research.
• C. They are only used in agriculture.
• D. They are used for weather forecasting.

Answer: (B)

Artificial radionuclides are produced in reactors or accelerators so their radiation can be detected or used to interact with materials and biological systems. This makes them especially useful in nuclear medicine for diagnostic imaging and targeted radiotherapy, and in research as tracers to study biological, chemical, and physical processes. That’s why the best answer is that they are used in nuclear medicine and research. The other statements don’t fit because artificial radionuclides are not limited to natural occurrence, their uses extend beyond agriculture, and they aren’t primarily used for weather forecasting.