The apple has often been considered the fruit that Eve gave to Adam in the Garden of Eden, however the Bible never stated the type of fruit. It was the Renaissance painters that chose the apple.
Titan: Adam and Eve 1550
Some scholars suggest the pomegranate, others figs. Apples are unlikely as they were less common and not that suited to the Fertile Crescent, although are noted to have grown in ancient times in Egypt.
The confusion may have arisen out of a play on Latin words. The pun only works in Latin. The word for apple and evil in Latin being the same – malum, (apart from a different accent on the letter ‘a’). From this root comes the latin name for the apple genus Malus , with the eating apple being Malus pumila,