Citric acid is commonly found in __________.

oranges

The correct answer is option 3. oranges.

Citric acid is commonly found in oranges.

Citric acid is abundant in citrus fruits such as oranges, lemons, limes, and grapefruits. It gives these fruits their characteristic tart flavor and is often used as a natural preservative and flavoring agent in foods and beverages. While it may be present in trace amounts in some other fruits and vegetables, citrus fruits are the primary natural sources of citric acid.