Final answer:
Repair and maintenance items are the correct answer because they are not a raw material or component used in production, but rather are support goods.
Step-by-step explanation:
The item that does NOT belong to the materials and parts group of industrial products is D. repair and maintenance items. Materials and parts typically refer to the raw materials and components used in the production of goods. Examples include farm products like wheat, petroleum, timber, and natural products such as iron ore. Repair and maintenance items, however, are support goods and are not part of the actual manufacturing materials.