Classify each of the following as either a citrus fruit or non citrus-fruit: apples, pears, watermelons, lemons, clementines, mandarines
Apples are not a citrus fruit.
 Pears are not a citrus fruit.
 Watermelons are not a citrus fruit.
 Lemons are a citrus fruit.
 Clementines are a citrus fruit.
 Mandarines are a citrus fruit.