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Which of the following radiations are used in radiotherapy?(a) Alpha rays(b) Beta rays(c) Gamma rays(d) X-raysThe 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

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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