The two paricles A and B have de Broglie...

The two paricles A and B have de Broglie wavelengths 1 nm and 5 nm respectively if mass of A is four times the mass of B, the ratio of kinetic energies of A and B would be :-

A

`5 : 1`

B

`25 : 4`

C

`20 : 1`

D

`5 : 4`

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