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Radiology General c2322501

Which of the following radioisotopes is commonly used as a source for external beam radiotherapy in the treatment of cancer patients –

A

Strontium–89

B

Radium–226

C

Cobalt–59

D

Cobalt–60

High-Yield Explanation

Cobalt - 60 and Cesium - 137 are most commonly used radioisotopes for teletherapy (External beam radiation).

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