Answer:
Option (c). Alpha particles type of radiation is blocked by the skin but is the most dangerous once it is inside the body.
What are alpha particles?
- A helium nucleus emitted by radioactive molecules, regarded as a ray.
Why other options are incorrect?
- Because they are not radioactive and dangerous as alpha particles.
- Hence, alpha particles type of radiation is blocked by the skin but is the most dangerous once it is inside the body.
For more questions on radiation,
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