Q. The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r1 = Minimum radius of the cam and θ = Angle turned through by the cam)

• (A) R(1 - cosθ)
• (B) (R - r1)(1 - cosθ)
• (C) R(1 - sinθ)
• (D) (R - r1)(1 - sinθ)