Centre of Mass and Collision Part 1

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements.
Statement – I : A point particle of mass m moving with speed v collides with stationary point particle of mass M. If the maximum energy loss possible is given as f(

1

2

mv2) then f=(

m

M+m

)
Statement – II:Maximum energy loss occurs when the particles get stuck together as a result of thecollision.