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In a sample of H-atoms electrons are de-...

In a sample of H-atoms electrons are de-exicited from `4^(th)` excited state to ground state. Which is/are correct statement ?

A

No line observed in P-fund series.

B

Total ten lines observed in spectrum.

C

`4` line in UV-region and `3` line in visible region observed.

D

One line observed in Brackkett series.

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