Which of these is/are a common source of radiation exposure for humans?

Name: Which of these is/are a common source of radiation exposure for humans?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

X-rays and cancer treatment involve ionizing radiation, which can be harmful in large doses. Radon gas, which is often found in basements and other enclosed spaces, can also emit radiation and increase the risk of lung cancer. Therefore, all three options are sources of radiation exposure for humans.

Which of These Is/are a Common Source of Radiation Exposure