Which of the following is used in External Beam Radiotherapy?: (A) I-131, (B) P-32, (C) I-125, (D) LINAC
Answer is D. External Beam Radiotherapy(EB/TELETHERAPY) is done using C0-60/Cs-137 which produce Gamma Rays Nowadays EB/TELETHERAPY is usually done using Linear Accelerator/LINAC which uses Xrays