If the unit digit in the product 75 ? x 49 x 867 x 943 be 1, then the

1.	If the unit digit in the product 75 ? x 49 x 867 x 943 be 1, then the value of ? is
A.	1
B.	3
C.	7
D.	9
Answer» E.

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If the unit digit in the product 75 ? x 49 x 867 x 943 be 1, then the value of ? is

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