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y2 = 4x and x2 = 4y divide the square region bounded by the lines x = 4, y = 4 and the coordinate axes. If S1, S2, S3 are respectively the areas of these parts numbered from top to bottom; then S1 : S2 : S3 is
A. 1 : 2 : 1
B. 1 : 2 : 3
C. 2 : 1 : 2
D. 1 : 1 : 1
Ans: D
Sol:
Hence, option D is correct.