Which pyrimidine base is not found paired with another base in DNA?

✅Explanation:
DNA contains two types of nitrogenous bases: purines (adenine and guanine) and pyrimidines (thymine and cytosine). These bases pair up specifically: adenine with thymine (A-T) and guanine with cytosine (G-C). Uracil is another pyrimidine, but it is found in RNA, not DNA.

📌Other Options:
Adenine and Guanine are purines.
Thymine is a pyrimidine correctly paired with adenine in DNA.