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Which type of radiation is the least penetrating and can be stopped by a sheet of paper? Use the background radiation context to keep Radioactive contamination distinct from nearby atomic and nuclear radiation ideas.
- A.Alpha radiation (radioactive contamination 28)
- B.Beta radiation (radioactive contamination 28)
- C.Gamma radiation (radioactive contamination 28)
- D.Neutron radiation (radioactive contamination 28)
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