This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Not a component of Brain stem 
Select and explain. 
A. Mid brain, B. Pons, C. Medulla, D. Spinal cord
D: Spinal cord
Answer: D: Spinal cord 
Explanation: Brainstem
1. Medulla:responsible for regulating and/ or coordination of:
- Blood pressure.
- Breathing.
- Swallowing.
- Coughing.
- Vomiting.
2. Pons : participates in respiratory regulation and the relay of information from cerebral hemispheres to the cerebellum.
3. Midbrain : participates in coordination of visual and auditory systems.