Which of the following DNA complementary base pairs is correctly paired? A-T A-G A-C A-U

The correct DNA complementary base pair is $A-T$. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). The other options, $A-G$, $A-C$, and $A-U$, are not correct DNA complementary base pairs.