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Consider a particle , beta particle and ...

Consider a particle , `beta` particle and `gamma - rays` , each having an energy of `0.5 MeV` . In increase order of panetrating poewr , the radiation are .

A

`a, beta , gamma `

B

`a, gamma, beta `

C

` beta , gamma,a `

D

` gamma , beta ,a, `

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The correct Answer is:
A

NA
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