I got a question for you: First recorded in the 1860s, the proverb originated in Wales, and was particularly prevalent in Pembrokshire. The first English version of the saying was "Eat an apple on going to bed, and you'll keep the doctor from earning his bread." The current phrasing ("An apple a day keeps the doctor away") was first used in print in 1922.

Answer this question: where does an apple a day keeps the doctor away come from?
Let's think first:
The important part for answering this question is: First recorded in the 1860s, the proverb originated in Wales, and was particularly prevalent in Pembrokshire.
Therefore, the answer is Wales.