Which of the following pairs of citrus is incorrectly matched?

Correct option is B

Citrus paradisi is actually grapefruit, not rough lemon. Rough lemon is scientifically known as Citrus jambhiri.
The correct matching for other citrus fruits is:
Citrus limettoides → Sweet lime
Citrus medica → Citron
Citrus aurantifolia → Sour lime