Which item is categorized as a lunch option?

The grilled cheese sandwich is categorized as a lunch option due to its characteristics as a savory, warm food that is commonly enjoyed during lunchtime. It is a classic dish made with melted cheese between slices of bread, which aligns well with typical lunch offerings that are hearty and filling.

The other options, while they can be eaten at any time of the day, are traditionally associated with breakfast or lighter meals. Pancakes, for example, are quintessential breakfast foods, often served with syrup and fruit. Fruit salad is generally seen as a refreshing option, typically enjoyed for breakfast or as a snack rather than a lunch. Oatmeal is also predominantly regarded as a breakfast item, valued for its heartiness and health benefits at the start of the day. Thus, among the choices, the grilled cheese stands out as the most appropriate choice for a lunch menu item.