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If lambda1 and lambda2 are the wavelengt...

If `lambda_1` and `lambda_2` are the wavelengths of the first member of the Lyman and Paschen series respectively, then `lambda_1 : lambda_2` is

A

`7 : 50`

B

`7 : 108`

C

`1 : 3`

D

`1 : 30`.

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