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If I1,I2,I3 be the ionising powers of al...

If `I_1,I_2,I_3` be the ionising powers of `alpha, beta` and `gamma` particles, the correct relation is

A

`I_1gtI_2gtI_3`

B

`I_1ltI_2ltI_3`

C

`I_1gtI_2` but `I_2ltI_3`

D

`I_1ltI_2` but `I_2gtI_3`.

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