Aesop's Fables-- is there a singular form?


“The Tortoise and the Hare” is ______.
Which of the following choices do you think is grammatically correct to fill in the blank?

1 an Aesop’s Fable
2 an Aesop Fable
3 an Aesop’s fable
4 an Aesop fable

Thanks in advance.

Actually, it should be “a fable by Aesop”, or “one of Aesop’s fables.” The story type is a fable, and the author is Aesop. When the collection of his fables is presented as a title, it is written Aesop’s Fables. There is more information here: Aesop's Fables - Wikipedia