The given plot shows the variation of potential energy U due to the interaction between two particles. Particles are separated by a distance r. Identify the correct statement out of the given statements:
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 B and C, and repulsive between points D and E on the curve.
4. The force of interaction between the particles is repulsive between points A and C.
Which of the above statements are correct?