The ratio of time for forward motion to that for return motion

Question

1. Fig. shows a quick return mechanism. The cranks OA rotates clockwise uniformly OA = 2 cm, OO¹ = 4 cm. The ratio of time for forward motion to that for return motion is                                                                   

     (a) 0.5                                                            (b) 2.0

      (c)                                                                (d) 0