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. 1, 4, 6
B. 4, 5, 6
C. 1, 2, 3
D. 1, 2, 3, 4, 5, 6
