If the shortest wavelength of \( \mathrm{H} \)-atom in Lyman Series is \( \mathrm{X} \) then the...

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If the shortest wavelength of \( \mathrm{H} \)-atom in Lyman Series is \( \mathrm{X} \) then the longest wavelength in Balmer Series of \( \mathrm{He}+ \) is
(1) \( \frac{9 X}{5} \)
(2) \( \frac{38 X}{5} \)
(3) \( \frac{X}{4} \)
(4) \( \frac{5 X}{9} \)
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