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The spectral series which corresponds to the electronic transition from the levels $n_2=5,6,\ldots$ to the level $n_1=4$ is
A
Pfund series
B
Brackett series
C
Lyman series
D
Balmer series
Detailed Solution
Transitions ending at $n_1=4$ correspond to the Brackett series (Pfund is $n_1=5$, Lyman is $n_1=1$, Balmer is $n_1=2$).
