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A collection of H-atoms in 9th excited s...

A collection of H-atoms in 9th excited state returns to ground state . Calculate ratio of total number of spectral lines emitted without emitting any line in Brackett series to number of Brackett series lines .

A

`(36)/(6)`

B

`(45)/(6)`

C

`(45)/(39)`

D

6

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The correct Answer is:
A
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