Which of the following pairs correctly identifies the bases in DNA?

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The correct identification of the bases in DNA consists of adenine, cytosine, thymine, and guanine, which are represented by the letters A, C, T, and G. DNA is a double-stranded molecule that encodes genetic information, and these four bases pair specifically: adenine pairs with thymine, and cytosine pairs with guanine.

In contrast, options that include uracil (U) reference RNA instead of DNA. In RNA, uracil replaces thymine, which is why the combinations including uracil are not applicable when discussing the bases in DNA. The understanding of these base pairings is fundamental in genetics and molecular biology, as they determine how genetic information is stored and transmitted within living organisms.