In a 3x3 matrix, each row contains a circle, a square, and a triangle in rotating order. The number of sides of each shape increases left to right by one. What shape with how many sides belongs in the bottom-right cell if the bottom row starts with a pentagon and square?
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A
Triangle with 3 sides
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B
Hexagon with 6 sides
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C
Heptagon with 7 sides
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D
Pentagon with 5 sides