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

The Extract Geometry command in NX is a powerful tool used to derive various types of geometry from existing objects within a design. Among the options provided, PMI (Product Manufacturing Information) Annotation is fundamentally different from the other entities listed.

PMI Annotations are metadata that provide vital information about a part's geometry, such as dimensions, tolerances, and other specifications related to manufacturing and assembly. They do not constitute geometric shapes or entities on their own; rather, they enhance the 3D model by adding non-geometric information crucial for understanding how the part is intended to be manufactured.

On the other hand, solid bodies, surface faces, and sketch planes are all geometrically defined entities. Solid bodies represent tangible forms in 3D space, surface faces are part of the geometrical representation of these solids, and sketch planes provide a base for creating sketch geometry. Each of these can be extracted as they possess a geometric nature that can be utilized or manipulated within the design environment.

Thus, while solid bodies, surface faces, and sketch planes can all be derived and used through the Extract Geometry command, PMI annotations do not fit this category, reinforcing the understanding that not all visible elements in a CAD model are eligible for extraction as geometric entities.