The isotope used to remove the brain tumours and treatment of cancer is-

Correct option is D

The correct answer is (d) Co-60.
· Cobalt-60 is a radioactive isotope of cobalt that emits gamma rays, which are used in radiation therapy for cancer treatment. It is particularly effective in targeting and destroying cancerous cells while minimizing damage to surrounding healthy tissue.
Details on other options:
· Na-24 (Sodium-24): Sodium-24 is a radioactive isotope of sodium.It has a relatively short half-life (around 15 hours) and is primarily used in biological and medical research rather than in clinical treatments.
· C-12 (Carbon-12): Carbon-12 is a stable isotope of carbon, meaning it is not radioactive.It is the most abundant carbon isotope and is essential for life, but it is not used in medical treatments for cancer or tumor removal.
· U-235 (Uranium-235): Uranium-235 is a radioactive isotope of uranium.It is primarily used in nuclear reactors for generating electricity and in nuclear weapons, but it is not used in medical treatments for cancer.