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Question

Please read the following scenario to answer the following questions.
While radioactive isotopes are used in medicine to identify tumors and other diseases, they can also be used to treat diseases such as cancer. One method to treat cancerous tumors is to expose them to radiation, which can kill the cancerous cells and the tumor. In 2013, the U.S. Food and Drug Administration approved a new cancer treatment based on the radioactive isotope radium-223; this isotope has a half-life of 11.4 days. The radioactive drug, known as Xofigo, is injected into the patient's bloodstream and travels to certain regions of the body. Because it emits high-energy radiation over short distances, it can kill cancerous cells in the sites where it localizes.
After the drug was injected into a person, the following data were collected regarding the amount of radiation measured in different organs in the person's body.
Organ Measured radiation
Brain 0.37
Liver 11.01
Bones 4262.60
Lungs 0.27
Urinary bladder 14.90

Using the table above, what kind of cancer do you think Xofigo is used to treat?
A) liver cancer
B) bone cancer
C) brain cancer
D) lung cancer

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