The correct option is (C) Guanine, Cytosine.
In DNA Adenine always pairs with thymine in base pairing, while guanine always couples with cytosine.
Base Pairing in DNA:
- Two bases are referred to as a base pair when referring to a "rung of the DNA ladder."
- A sugar molecule, a phosphoric acid molecule, and a molecule known as a base make up a DNA nucleotide.
- The "letters" that make up the genetic code are the bases. Adenine, thymine, guanine, and cytosine are the compounds that are represented by the code letters A, T, G, and C in DNA, respectively.
- Adenine always pairs with thymine in base pairing, while guanine always couples with cytosine.
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