What is a potential risk associated with radioactive isotopes?

NY Regents Chemistry Exam June 2022

30 What is a potential risk associated with radioactive isotopes? (1) biological exposure (2) curing of diseases (3) industrial measurements

(4) tracing chemical processes

Explanation: We are looking for a risk, something negative. Curing diseases and tracing chemical processes is positive as well as industrial measurements.

Answer: 1