Lets move to question 8 A = 4^2m and B = 9^2n. Which of the following is the unit’s digit

Lets move to question 8

A = 4^2m and B = 9^2n.
Which of the following is the unit’s digit in A + B, if A andB are integers?
(A)5
(B)4
(C)9
(D)1
(E)7

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