This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
[{'content': 'Which one of the following forms of radiation can penetrate the deepest into body tissue? \nSelect and explain. \nA. alpha, B. beta, C. gamma, D. positron', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Gamma radiation Most penetrating of the given options and it penetrates the deepest into the human body. Alpha paicles are usually stopped by the human skin.', 'role': 'assistant'}]