What is the unit digit in {(6374)^1793 x (625)^317 x (341)^491)}?  Choices.
A) 0	B) 1	C) 2	D) 3	E) 5
Unit digit in (6374)1793 = Unit digit in (4)1793   = Unit digit in [(42)896 x 4]   = Unit digit in (6 x 4) = 4   Unit digit in (625)317 = Unit digit in (5)317 = 5   Unit digit in (341)491 = Unit digit in (1)491 = 1   Required digit = Unit digit in (4 x 5 x 1) = 0.   Option 0
<result>A</result>
What is the unit digit in {(6374)^1793 x (625)^317 x (341)^491)}?