Which of the following statements best describes the sulcus limitans?

B. The sulcus limitans separates the sensory alar from the motor basal plates. It is found in the developing spinal cord and on the surface of the adult rhomboid fossa of the fourth ventricle. The bulbopontine sulcus (inferior pontine sulcus) separates the medulla from the pons. The hypothalamic sulcus separates the thalamus from the hypothalamus. The rhinal sulcus separates the neocortex from the allocortex.