This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Radiology
Remote after Loading is done is? 
Select and explain. 
A. Stereotactic Radiotherapy, B. Proton Beam Radiotherapy, C. External Beam Radiotherapy, D. Brachytherapy
D: Brachytherapy
Answer: D: Brachytherapy 
Explanation: Remote afterloading is done in Brachytherapy in which the system automatically administer a radioisotope directly to cancerous tissue, thereby minimizing the radiation dose to surrounding tissue and eliminating the radiation exposure to hospital staff. In brachytherapy, a radioisotope is placed onto or inside the patient. The source of radiation is put inside a sealed capsule ,which prevents it from moving or dissolving in body fluids but allows the emission of ionising radiation to the surrounding tissues.