This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Functional basis of ionising radiation depends on: \nSelect and explain. \nA. Functional basis of ionising radiation depends on:, B. Removal of orbital electron, C. Linear energy transfer, D. Adding orbital electron', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Removing orbital electrons', 'role': 'assistant'}]