The correct pairing of DNA bases A. T with A, and C with G. Thus, option "A" is correct.
It can be explained with the help of complementary base pairing.
In DNA, thymine (T) always forms a base pair with adenine (A) and cytosine (C) always base pairs with guanine (G) .
There are two hydrogen bonds present in between A and T and three hydrogen bonds in between G and C.
Thus, option "A" is correct.
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