Which of the following statements is true?

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(B) The hydrogen spectrum consists of discrete lines,not a continuous spectrum. $1$. The Lyman series lies in the ultraviolet region. $2$. The Balmer

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Paschen series is a line spectrum in the infrared region.

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(B) The hydrogen spectrum consists of discrete lines,not a continuous spectrum. $1$. The Lyman series lies in the ultraviolet region. $2$. The Balmer series lies in the visible region. $3$. The Paschen series lies in the infrared region. $4$. The spectral series formula is derived from the Bohr model,not the Rutherford model. Therefore,the correct statement is that the Paschen series is a line spectrum in the infrared region.

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