Correct option is B
According to Faraday's Law of Electromagnetic Induction, the induced EMF (electromotive force) in a conductor is maximized when the conductor moves
perpendicular to the magnetic lines of flux. This is because the rate of change of the magnetic flux through the conductor is greatest when the motion is perpendicular, as it cuts through the maximum number of magnetic lines of force.
If the conductor moves parallel to the magnetic lines of flux, there will be no change in flux, and thus no EMF will be induced.
Therefore, the correct answer is option (b) Perpendicular to the magnetic lines of flux.