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If ratio of the 1st three Bohr orbits in...

If ratio of the 1st three Bohr orbits in H is `1:4:9`, then the ratio of 1st three orbits in `He^(+)` will be

A

1 `0.5:2:4.5`

B

2. `2:4:8`

C

3. `2:3:4`

D

4. `1:4:9`

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The correct Answer is:
D
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