What is not a practical use of radionuclides?

Group of answer choices

Irradiation of some foods in order to transmutate poisonous elements into nonpoisonous elements.

Radioactive dating to estimate the age of an article.

To be power sources of heart pacemakers.

To act as radioactive tracers in medicine, in chemical research, and plant studies.

Serves as radioactive source in smoke detectors.