Which of the following does NOT typically contain nitrogen?

Carbohydrates do not typically contain nitrogen. Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen, usually in a ratio that can be simplified to (CH₂O)n. While they serve as a primary energy source and structural component in living organisms, their chemical structure does not include nitrogen.

In contrast, proteins are made up of amino acids, which contain nitrogen in their amine groups. Nucleic acids, such as DNA and RNA, also include nitrogen bases in their structure. Various acids, like amino acids or nucleotides, known as acids, can also contain nitrogen due to their functional groups. Thus, among the given options, carbohydrates are the only ones that characteristically lack nitrogen in their composition.