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An electron in the ground state of hydro...

An electron in the ground state of hydrogen was excited to a higher energy level using monochromatic radiations of wave length`(lamda)` 975 Å. The longest wave length that appears in the resulting spectrum is due to transition from

A

`n_4rarrn_1`

B

`n_4rarrn_3`

C

`n_5rarrn_4`

D

`n_5rarrn_1`

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