A particle is projected in a gravity free space. If the particle suffers deviation but its kinetic energy remains unchanged, then in that region

Due to the action of electric force, the kinetic energy of the particle must change but since direction of magnetic force FB→=QV→×B→ is always perpendicular to the direction of motion and hence wok done by magnetic force on the particle is zero and its kinetic energy remains unchanged.Hence option -(2) is correct