text: The<unk> es are a pair of small round bodies, located on the undersurface of the brain, that form part of the limbic system.  They are located at the ends of the anterior arches of the fornix, and are named<unk>  for their resemblance to two breasts.  They consist of two groups of nuclei, the medial<unk>  nuclei and the lateral<unk>  nuclei.Neuroanatomists have often categorized the<unk> es as part of the hypothalamus.
option_0: Mammillary body
option_1: Caudate nucleus
option_2: Gracile nucleus
option_3: Cuneate nucleus
option_4: Area postrema
option_5: Zona reticularis
option_6: Periaqueductal gray
option_7: Ventral tegmentum