The given plot shows the variation of \( U \), the potential energy of interaction between two p...

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The given plot shows the variation of \( U \), the potential energy of interaction between two particles with the distance separating them \( r \).
1. \( B \) and \( D \) are equilibrium points
2. \( C \) is a point of stable equilibrium
3. The force of interaction between the two particles is attractive between points \( C \) and \( D \) and repulsive between \( D \) and \( E \)
4. The force of interaction between particles is repulsive between points \( E \) and \( F \). Which of the above statements are correct?
(a) 1 and 2
(b) 1 and 4
(c) 2 and 4
(d) 2 and 3.
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