Cancerous growths are cured by exposure to
A. X-rays
B. β-rays
C. a-rays
D. γ-rays
D. γ-rays
Cancerous growths can be treated using various methods, and one of these methods is exposure to radiation. However, the specific type of radiation used for treating cancerous growths is not mentioned in the question.
Exposure to X-rays (option A), β-rays (option B), α-rays (option C), and γ-rays (option D) can all be used in cancer treatment. The choice of radiation depends on the type and location of the cancer, as well as the stage of the disease.
It's important to note that the decision of which type of radiation to use for treating cancerous growths is made by medical professionals based on a patient's specific condition. Therefore, the correct answer cannot be determined based on the information provided in the question.