The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g.,line no. $5$ arises from the transition from level $B$ to $A$). Which of the following spectral lines will also occur in the absorption spectrum?
- A$1, 4, 6$
- B$4, 5, 6$
- C$1, 2, 3$
- D$1, 2, 3, 4, 5, 6$
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