The H.C.F. of 3150 and a number is 42. Which of the following can be the number?
A. [tex]2^{2}[/tex] x [tex]3^{2}[/tex] x 5
B. [tex]2^{2}[/tex] x [tex]3^{2}[/tex] x [tex]5^{2}[/tex]
C. [tex]2^{2}[/tex] x 3 x 7
D. [tex]2^{2}[/tex] x [tex]3^{2}[/tex] x 7

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