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The relative penetrating power of alpha,...

The relative penetrating power of `alpha,beta,gamma` and neutron (n) follows the order :

A

`alphagtbetagtgammagtn`

B

`ngtgammagtbetagtalpha`

C

`betagtalphagtngtgamma`

D

None of these.

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The correct Answer is:
D
`gamma` has maximum penetrating power.
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