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
Which one of the following forms of radiation can penetrate the deepest into body tissue? 
Select and explain. 
A. alpha, B. beta, C. gamma, D. positron
C: gamma
Answer: C: gamma 
Explanation: 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.