Which of the following is a nitrogenous base found in DNA?

Thymine is a nitrogenous base that is specifically found in DNA. It is one of the four primary bases in DNA, alongside adenine, cytosine, and guanine. In the structure of DNA, thymine pairs with adenine through hydrogen bonds, which is crucial for the formation of the double helix structure and for maintaining the genetic code.

Uracil, on the other hand, is found in RNA instead of DNA and replaces thymine in RNA structures. Ribose and deoxyribose are types of sugars; ribose is part of RNA, while deoxyribose is the sugar component of DNA but does not function as a nitrogenous base. Thus, thymine is correctly identified as the nitrogenous base present in DNA.