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The figure indicates the enegry level di...

The figure indicates the enegry level diagram of an atom and the origin of six spectral lines in emission (e.g. line no.`5` series from the transition from level `B` to `A`). The following spectral lines will also occur in the absorption spectrum

A

`4, 5, 6`

B

`1, 2, 3, 4, 5, 6`

C

`1, 4, 6`

D

`1, 2, 3`

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The correct Answer is:
D
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