If V_(CM) is velocity of C.M. of system and M is the total mass of system. Pick up the wrong statement

If V_(CM) is velocity of C.M. of system and M is the total mass of sys

1.	If V_(CM) is velocity of C.M. of system and M is the total mass of system. Pick up the wrong statement
Answer» `MV_(CM)` represent Vector sum of the linear momenta of particles of the system `MV_(CM)` CONSTANT, if no external FORCE ACT on the system `MV_(CM)` is constant even is external force is acting on the system `MV_(CM)` is not constant when only internal force act on the system Answer :C