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As per sommerfeld 's extension which of ...

As per sommerfeld 's extension which of these is correct ?

A

orbits of all electrons in an atom are elliptical

B

nucleus is present in the geometric center of the ellipse

C

`V_(transverse)=n_(phi).(h)/(2pi)` where `n_(phi) ne 0, n_(phi) in +I`

D

The fourth shell has only circular orbits

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The correct Answer is:
C
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