A woman has given birth to fraternal twin daughters. How many ovum/ova would have been released by the ovary?

Two

The correct answer is Option (2) → Two 

Fraternal twins (non-identical) result from the fertilization of two separate eggs (ova) by two separate sperm. Each twin develops from its own fertilized egg (zygote), and they are genetically distinct.

The ovary must release two ova (eggs) in the same menstrual cycle (either from the same ovary or one from each ovary).Both eggs are fertilized by different sperm, leading to two embryos.

Therefore, the number of ova released is two.