Question

Radiotherapy is used for:
A) Detecting bone fracture.
B) Detecting cardiac trouble.
C) Getting the whole body's photograph.
D) Treating cancer by controlled exposure to X-rays.

Answer 1

Hint: Radiation therapy is also known as radiotherapy. It is a cancer treatment that uses high doses of radiation to destroy cancer cells and shrink tumours. At low doses, radiation is used in x-rays to view inside the body, as with x-rays of the teeth or broken bones.

Complete step-by-step answer:

Cancer is a disease that develops when cells in the human body split more quickly than normal. These abnormal cells grow into a lump or tumour.
Radiation therapy is a cancer treatment that uses high-energy x-ray or other particulates to destroy cancer cells. A doctor who focuses on giving radiation therapy to treat cancer is known as a radiation oncologist. A radiation therapy regimen, or schedule, generally is made up of a certain number of treatments given over a certain period. In radiotherapy, X-rays are used to treat cancer by controlled exposure.
Radiation therapy can treat several different types of cancer. It can also be used in combination with other cancer treatments, like chemotherapy and/or surgery. Radiation therapy may cause side effects, which include skin irritation, fatigue, hair loss, and others.

Therefore the correct answer is Option D.

Note: Cancer starts when healthy cells change and grow out of control. All cells in the body go through a cycle to grow, split and multiply. Cancer cells go through this process quicker than normal cells. Radiation therapy damages cell DNA so the cells stop growing or are destroyed. Radiation therapy uses high-energy particles or waves, like gamma rays, x-rays, electron beams, or protons, to damage or destroys cancer cells.