As we have leant:
Medulla Oblongata:
- The medulla oblongata sits at the transition zone between the brain and the spinal cord.
- Medulla oblongata receives and integrates signals from spinal cord and sends resulting signals to the cerebellum and thalamus.
- It contains centres that regulate heart rate, blood pressure, breathing, swallowing, salivation, sneezing, vomiting and coughing and other involuntary movements.
Pons Varolii:
- The pons connects the medulla oblongata with the midbrain region.
- It also relays signals from the forebrain to the cerebellum.
- It houses the control centers for respiration and inhibitory functions.
- The pneumotaxic centre limits inspiration.
- The cerebellum is attached to the dorsal side of the pons.
Therefore, the pneumotaxic centre and rhythm centre are respectively present in pons and medulla oblongata. Hence, the correct answer is option a.
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