Select the figure from among the given options that can replace the question mark (?) in the following series.
In the first, second, third, and fourth boxes, 2, 3, 5, and 7 triangles are available. It means that triangles are increasing consecutively from one box to the other one in the form of prime numbers.
So in the fifth box, 11 triangles should be there.
Hence option (d) will come in place of the question mark.
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