The transition(s) giving rise to the yellow sodium D line(s) is/are

1
2P3/2 ← 2S1/2 and 2P1/2 ← 2S1/2
2
2D3/2 ← 2P1/2
3
2D3/2 ← 2S1/2 and 2P1/2 ← 2S1/2
4
2D3/2 ← 2P3/2 and 2P3/2 ← 2S1/2

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