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Which of the following radiations are used in radiotherapy?

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in Biology – Class 12 by (271k points)
Which of the following radiations are used in radiotherapy?

(a) Alpha rays

(b) Beta rays

(c) Gamma rays

(d) X-rays

The question was posed to me in class test.

This is a very interesting question from Human Health and Disease in portion Human Health and Disease of Biology – Class 12

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Best answer
Correct choice is (c) Gamma rays

The best explanation: In radiotherapy, tumour cells are irradiated lethally by gamma rays which are the most penetrating and least ionising rays. For example, I^131 is used to treat thyroid cancer. These radiations generally kill the immature, fast dividing cancerous cells.

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