What is the remainder when 43^91 is divided by 5?
Choose the correct choice from the following
A) 0
B) 1
C) 2
D) 3
E) 4
The units digit of the exponents of 3 cycle in a group of 4: {3, 9, 7, 1}   91 has the form 4k+3 so the units digit of 43^91 is 7.   The remainder when dividing by 5 is 2.   The answer is 2.
<result>C</result>
What is the remainder when 43^91 is divided by 5?