Which of the following statement(s) is(are) correct about the spect...

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Which of the following statement(s) is(are) correct about the spectrum of hydrogen atom? [JEE Advanced-2021]
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(a) The ratio of the longest wavelength to the shortest
W wavelength in Balmer series is 9/5
(b) There is an overlap between the wavelength ranges of Balmer and Paschen series.
(c) The wavelengths of Lyman series are given by \( \left(1+\frac{1}{\mathrm{~m}^{2}}\right) \lambda_{0} \), where \( \lambda_{0} \) is the shortest wavelength of Lyman series and \( \mathrm{m} \) is an integer
(d) The wavelength ranges of Lyman and Balmer series do not overlap
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