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Three concentric spherical shells have radii `a, b` and `c(a lt b lt c)` and have surface charge densities `sigma, -sigam` and `sigma` respectively. If `V_(A), V_(B)` and `V_(C)` denote the potentials of the three shells, then for `c = q + b`, we have

A

`V_(C ) = V_(B) ne V_(A) `

B

`V_(C ) ne V_(B) ne V_(A) `

C

`V_(C ) = V_(B) = V_(A) `

D

`V_(C ) = V_(A) ne V_(B) `

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The correct Answer is:
D
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