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

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