Sucrase is a sugar found in which of the following?

Sucrase is an enzyme that breaks down sucrose, a common sugar found primarily in fruits and vegetables. In the context of the question, the focus is on the source of sucrose rather than the enzyme itself. Fruits and vegetables are rich sources of various sugars, including sucrose.

In contrast, while grains and nuts contain carbohydrates, their primary sugars are typically starches and not directly linked to sucrase. Meats and dairy do not contain significant amounts of sugars, as they primarily provide proteins and fats. Additionally, fats and oils are devoid of carbohydrates altogether, including any sugars. Therefore, fruits and vegetables stand out as the correct choice due to their natural sucrose content, which is where sucrase plays its role in digestion.