Concept:
Milling can be dry (mechanical grinding) or wet (soaking in liquid to separate components).
• Dry milling produces flour or grits.
• Wet milling is used to recover specific components like starch and gluten in pure form.
Step 1: Identifying the process for Maize.
Maize (Corn) wet milling is a large-scale industrial process.
The corn is "steeped" in water and sulfur dioxide for 24-48 hours.
Step 2: Understanding the separation.
Soaking softens the kernel and breaks the protein-starch bonds.
This allows for the separate recovery of germ, fiber, gluten, and pure starch.
Step 3: Analyzing other options.
Rice and Oats are typically dry-milled to produce polished grains or flakes.
Potato processing is usually referred to as "extraction" rather than wet milling.
Final Answer: (D)