A particle of mass \( m \) is located at a distance \( r \) from the P centre of a shell of mass...

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A particle of mass \( m \) is located at a distance \( r \) from the
P centre of a shell of mass \( M \) and radius \( R \). The force between the shell and mass is \( F(r) \). The plot of \( F(r) \) vs \( r \) is :
(A)
(B)
(C)
(D)
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