Name the high frequency radiation produced in nuclear reactions and also emitted by radioactive nuclei that is used in medicine to destroy cancer cells.

Gamma rays

The correct answer is option 2. Gamma rays.

The high-frequency radiation produced in nuclear reactions and emitted by radioactive nuclei, which is used in medicine to destroy cancer cells, is called Gamma rays.

Gamma rays are a form of electromagnetic radiation with extremely high frequencies and energies. They are produced during certain nuclear reactions, such as radioactive decay, and are also emitted by radioactive nuclei. In medicine, gamma rays are used in a technique called radiation therapy, where concentrated beams of gamma rays are targeted at cancerous tumors to destroy cancer cells while minimizing damage to surrounding healthy tissues. Gamma radiation is highly penetrating and can effectively kill cancer cells by damaging their DNA, making it a valuable tool in cancer treatment.