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A proton , a neutron , an electron and a...

A proton , a neutron , an electron and an `alpha`-particle have same energy. Then their de Broglie wavelengths compare as

A

`lambda_p = lambda_n gt lambda_e gt lambda_alpha`

B

`lambda_alpha lt lambda_p = lambda_n lt lambda_e`

C

`lambda_e lt lambda_p = lambda_n gt lambda_alpha`

D

`lambda_e = lambda_p = lambda_n = lambda_alpha`

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