A small ball of mass 1kg strikes a wedge of mass 4kg horizontally with a velocity of `10m//s`. Friction is absent everywhere and collision is elastic. Select the incorrect answer:
A. the horizontal component of linear momentum of the system (wedge+ball ) during the collision will remain conserved
B. the linear momentum of the system (wedge+ball) will remain conserved during the collision
C. the component of linear momentum of the ball along common tangent will remain same during the collision
D. the linear momentum of the ball along common normal will change during collision
