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Which statement is `//` are correct about hydrogen spectrum?

A

Energy of 2nd orbit is different for `._(1)H^(1), ._(1)H^(2)` and `._(1)H^(3)`

B

Visible spectrum can be obtained in Lyman series and Balmer series

C

Infrared spectrum can be obtained in Paschen, brackett and Pfund series.

D

Total number of emission lines obtained in Balmer series is `n-2` , where n is principal quantum number an `n gt 2`

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The correct Answer is:
1,3,4
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