Answer: Option D
:
D
Generally one of the two ovaries releases an egg which travels through the fallopian tube. If both the ovaries ovulate in the same cycle, eggs will pass through both the fallopian tubes and if these eggs get fertilised, it results in non-identical twins also called fraternal twins. Fraternal or dizygotic twins develop from 2 separately fertilized eggs usually in 2 separate amniotic sacs. Each amniotic sac will have its own placenta and supporting structures. Identical or monozygotic twins may or may not share the same amniotic sac.