Which of the following is NOT an FGI Portion Marking?

The answer indicates that "FGI TOP" is not a recognized portion marking for Foreign Government Information (FGI). In the context of marking classified information, FGI portion markings are specific indicators used to signify the classification level of foreign government information that is included in a document. The standard markings are often related to levels of confidentiality, such as "CONF" for Confidential, and "C" for classified content.

By contrast, "TOP" is not used as a marking for FGI within the classification system established for handling such information. The recognized portion markings serve to clearly communicate the sensitivity and handling instructions for various portions of classified documents, ensuring that individuals who interact with the information understand the need for safeguarding it based on its classification level. Thus, while "S," "CONF," and "C" are valid marks indicating different levels of classification and sensitivity of FGI, "TOP" does not conform to this established system and is therefore not a proper FGI portion marking.