Solve que 37

37.  Two identical glass rods S₁ and S₂ (refractive Index. 1.5) have one convex end of radius of curvatur 10 cm. They are placed with the curved surfaces at a distance d as shown in the figure, with their axes (shown by the dashed line) aligned. When a point source of light P is placed inside rod S₁, on its axis at a distance of 50 cm from the curved face, the light rays emanating from it are found to be parallel to the axis inside S₂. the distance d is                                                                                  [JEE Advance - 2015]

 (A) 60 cm                         (B) 70 cm                       (C) 80 cm                  (D)  90 cm