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
Following organ is LEAST radiosensitive to the effects of exposure to radiation: 
Select and explain. 
A. Testis, B. Bone marrow, C. Muscle, D. Intestine
C: Muscle
Answer: C: Muscle 
Explanation: None