Final answer:
The correct order from most inferior to most superior components of the brainstem is the medulla oblongata, pons, and midbrain, which corresponds to option a).
Step-by-step explanation:
When placing the parts of the brainstem from most inferior to most superior, the correct order is the medulla oblongata, the pons, and the midbrain. This sequence matches option a) Medulla oblongata, pons, midbrain. The medulla oblongata is located at the base, directly connected to the spinal cord, followed by the pons positioned above it, and finally, the midbrain sits at the topmost part, just beneath the forebrain.