[" 2.During inelastic collision between two bodies,which of the following quantities always "],[" remain conserved? "]

During inelastic collision between two objects, which of the following quantity always remains conserved?

In a perfectly inelastic collision between two bodies

For inelastic collision between two spherical rigid bodies, which one of the following statements is correct?

In an elastic collision of two billiard balls which of the following quantities is not conserved during the short time of collision :

Which of the following quantity is conserved in all collision prosess ?