Question

(Pls Help )Any radiation treatment has the potential to damage DNA in healthy cells. Which lists therapeutic uses of radiation based on the likelihood of affecting healthy cells in order from least likely to most likely?
A. deep external beam radiation therapy, brachytherapy, radiopharmaceuticals
B. radiopharmaceuticals, deep external beam radiation therapy, brachytherapy
C. brachytherapy, radiopharmaceuticals, deep external beam radiation therapy
D. radiopharmaceuticals, brachytherapy, deep external beam radiation therapy

Answer 1

I'd say D. Radiopharmaceuticals target specific receptors on tumour cells. While there is a 'bystander effect' to neighbouring tissue, it is limited. Brachytherapy affects local tissue, next to where the beads are placed.

Answer 2

THE ANSWER IS D FOR A FACT