The correct option is B Mullerian duct
Mullerian ducts are paired ducts arises from the mesodermal layer in the embryonic development. It is a finger-shaped invagination and run laterally down the side of the urogenital ridge and terminate at the Mullerian eminence in the primitive urogenital sinus found in the frogs or other vertebrates. In the female, they will develop to form the oviducts, uterus and the upper portion of the vagina.