What is the unit digit in (4137)^754?  Select.
A) 9  B) 11  C) 12  D) 13  E) 15
Unit digit in (4137)754 = Unit digit in {[(4137)4]188 x (4137)2}   =Unit digit in { 292915317923361 x 17114769 }   = (1 x 9) = 9   9)
<result>A</result>
What is the unit digit in (4137)^754?