A 2 x 2 x 3 x 3 x 7
B 2 x 2 x 2 x 3 x 7
C 3 x 3 x 3 x 3 x 7
D 2 x 3 x 3 x 3 x 7
Correct Answer: Option A
Clearly, 252 = 2 x 2 x 3 x 3 x 7.
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