Early development of the human nervous system in the correct chronological order
a) Synaptogenesis → Neurogenesis → Myelination → Synaptic pruning
b) Neurogenesis → Synaptogenesis → Myelination → Synaptic pruning
c) Myelination → Synaptogenesis → Synaptic pruning → Neurogenesis
d) Synaptic pruning → Neurogenesis → Synaptogenesis → Myelination
