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 B, and repulsive between points D and E on the curve.4. The force of interaction between the particles is repulsive between points C and A.Which of the above statements are correct?