If the shortest wave length of Lyman series of \( \mathrm{H} \) atom is \( \mathrm{x} \), then t...

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If the shortest wave length of Lyman series of \( \mathrm{H} \) atom is \( \mathrm{x} \), then the wave length of the first line of Balmer series of \( H \) atom will be:
(a) \( 9 x / 5 \)
(b) \( 36 x / 5 \)
(c) \( 5 \times / 9 \)
(d) \( 5 \times / 36 \)
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