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The limiting line in Paschen series corr...

The limiting line in Paschen series corresponds to

A

`n _(1) = 3, n _(2) = 4`

B

`n _(1) = 3, n _(2) = 3`

C

` n _(1) = 3, n _(2) = 10`

D

`n _(1) = 3, n _(2) = oo`

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`n _(1) = 2, n _(2) = oo`
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