Answer:
in medicine
carbon-14 dating
Explanation:
Radioactivity is involved in medicine and C-14 dating. C-14 dating is used to determine the age of fossils. In medicine a frequently used radioisotope is iodine-131 that is used in the diagnosis of thyroid cancer, to locate tumors of the liver and brain. It is frequently employed to monitor the functioning of the thyroid gland.
