This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy Pa 1, Subject name: Radiology
Electron Beam Radiotherapy is used in treatment of? 
Select and explain. 
A. Deep Seated Brain Tumors, B. Skull Base Chordomas, C. Mycosis Fungoides, D. Lung Cancer
C: Mycosis Fungoides
Answer: C: Mycosis Fungoides 
Explanation: Electron Beam Radiotherapy MC used for Intraopeive Used for Superficial Cancers like Mycosis Fungoides. Tumours of Eyelids & lips Skull Base Chordomas/Deep Seated Brain Tumors are usually treated by Proton Beam Radiotherapy