The correct order of cell types from least differentiated to most differentiated is:
totipotent stem cells → pluripotent stem cells → multipotent stem cells → neuron
So the correct response is: totipotent stem cells → pluripotent stem cells → multipotent stem cells → neuron.
Totipotent stem cells can differentiate into any cell type, including placental cells. Pluripotent stem cells can differentiate into nearly all cell types but not into extra-embryonic tissues. Multipotent stem cells can differentiate into a limited range of cell types, and neurons are fully differentiated cells.