For a two `` body system in absence of external forces, the kinetic energy as measured from ground frame is `K_(0)` and from centre of mass frame is `K_(cm)`. Pick up the wrong statement.

Options

A. The kinetic energy as measured from center of mass frame is least
B. Only the portion of energy `K_("cm")` can be transformed from one form to another due to internal changes in the system.
C. The system always retains at least `K_(o) -K_("cm")` amount of kinetic energy as measured from ground frame irrespective of any kind of internal changes in the system.
D. The system always retains at least `K_("cm")` amount of kinetic energy as measured from ground frame irrespective of any kind of internal changes in the system

Answer

A, B, C