. During head on elastic collision, two bodies of masses m_(1) and m_(2)completely exchange their velocities when

. During head on elastic collision, two bodies of masses m_(1) and m_(

1.	. During head on elastic collision, two bodies of masses m_(1) and m_(2)completely exchange their velocities when
Answer» `m_(1) lt lt m_(2)` `m_(1) gt gt m_(2)` `m_(1) = m_(2)` `m_(1) LE m_(2)` ANSWER :C