A plane progressive transverse wave is passing through medium along the positive x-axis at the given instant of time The nature of the displacement - position ( y vs x ) graph of particles of medium at that instant is as shown in figure.Which of the following statements are correct.(A B C are three particles of the vibrating string) A) Elastic potential energy per unit length of the string at the point B is more than that at points A and C B) Elastic potential energy per unit length of the string at the point C is more than that at points A and B C) Velocity of the particle at A is along negative y -axis. D) Velocity of the particle at C is along positive y- axis. 1) Only B C D are correct 2) Only A C D are correct 3) Only A C are correct 4) Only A D are correct