The correct option is D Female and produce a clear fluid, which lubricates the vestibule during copulation.
A pair of accessory gland known as Bartholin’s glands or Cowper’s glands is present in female rabbit. This gland is embedded in the dorsal wall of the vestibule. It produces clear viscid secretion for lubrication during copulation. Thus, the correct answer is 'Female and produce a clear fluid, which lubricates the vestibule during copulation'.