Which mythological woman fell in love with Cupid after being granted immortality by Jupiter?

Psyche is the correct answer because she is a central figure in the myth that involves her love story with Cupid, also known as Eros. In the myth, Psyche is a mortal woman whose beauty rivals that of Venus (Aphrodite), Cupid's mother. Jealous of her beauty, Venus sends Cupid to make Psyche fall in love with something hideous. However, upon encountering her, Cupid falls in love with her instead.

As the story progresses, Psyche faces many trials due to the jealousy and wrath of Venus, which leads to her seeking the help of Jupiter. In a moment of compassion, Jupiter grants Psyche immortality so that she may be with Cupid forever. This act not only solidifies the bond between the two but also allows Psyche to transcend her mortal limitations, symbolizing the theme of love conquering all obstacles.

The other figures listed, such as Aphrodite, Eve, and Medusa, do not fit into this specific narrative about love and immortality in relation to Cupid. Aphrodite is the goddess of love and Cupid's mother, Eve is a figure from Abrahamic religious texts, and Medusa is a monster from Greek mythology, making Psyche the unique choice for this