Which of the following us used in the treatment of blood cancer?

Detailed Solution:

The correct answer is “Cobalt-60”.

Cobalt-60 is indeed used in the treatment of certain types of blood cancer, particularly as part of radiation therapy.

Cobalt-60 is a radioactive isotope that emits high-energy gamma rays. These gamma rays can be focused on cancerous cells to damage their DNA and inhibit their growth.