This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
Remote after loading is used in 
Select and explain. 
A. Brachytherapy, B. proton beam, C. Electron beam, D. Cyberknife therapy
A: Brachytherapy
Answer: A: Brachytherapy 
Explanation: ref : david sutton 9th ed