Using the Extract Geometry command, which one of these objects cannot be extracted?

The Extract Geometry command in Siemens NX is designed to selectively create references to existing geometric entities for use in other modeling operations. Each of the options represents different types of geometric and non-geometric entities within the NX environment.

PMI Annotation refers to Product and Manufacturing Information such as notes, tolerances, and other annotations applied to a model. While these are important for communicating design intent and requirements, they do not represent physical geometric entities in the same way as bodies, curves, or datums. The Extract Geometry command focuses on entities that have a geometric representation in 3D space, such as solid bodies, curves, and datums, which can be utilized in creating new geometry or in analysis.

In contrast, bodies consist of solid objects, composite curves consist of several geometrically defined curves, and datums are defined reference points, lines, or planes, all of which can be directly utilized or referenced for extracting geometry.

Therefore, PMI Annotation cannot be extracted as it does not have a geometric form necessary for the Extract Geometry command to function, making it the correct option in this context.