The correct option is A Liver fluke
Liver fluke or Fasciola hepatica adults are hermaphroditic i.e, capable of both cross-fertilization and self-fertilization. During self-fertilization, sperms from the same fluke enter the uterus through the female genital pore to fertilize the eggs in the distal part of the oviduct. So, the correct answer is 'Liver fluke'.