[" In the figure shown a thin parallel beam of light is incident on a plane "],[" miror "m" ,at small angle "theta" ' "m_(2)" is a concave miror of focal length "f" ."],[" After three successive reflections of this beam the "x" and "y" coordinates of "],[" the image is "],[[" (A) "x=f-d,y=f theta," (B) "x=d+f,y=f theta," (C) "x=t-d,y=-f theta," (D) "x=d-f,y=-1]]