what is the unit digit in (7^95-3^58)?	Choose the correct choice
A) 0	B) 4	C) 6	D) 7	E) None of them
Unit digit n 7^95=Unit digit in [(7^4)^23 x 7^3]=(1x3)=3   Unit digit in 3^58=Unit digit in [(3^4)^14 x 3^2]=(1x9)=9   Unit digit in (7^95 - 3^58)=(13-9)= 
<gadget id="calculator">(13-9)</gadget>
<output>4</output>
4   Answer is 4.
<result>B</result>
what is the unit digit in (7^95-3^58)?