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
Pneumotaxic center; True is: 
Select and explain. 
A. Contains both I and E neurons, B. May play a role in fine tune of breathing, C. Both, D. None
C: Both
Answer: C: Both 
Explanation: Pneumotaxic Center : Controls rate of breathing.

Located in the medial parabrachial and Kolliker-Fuse nuclei of the dorsolateral pons.
Contains both I and E neurons.
The normal function of the pneumotaxic center is unknown, but it may play a role in smooth switching between inspiration and expiration (“fine-tune” of the breathing).
A strong pneumotaxic signal can increase the rate of breathing 30-40 breaths per minute, whereas a weak pneumotaxic signal may reduce the rate to only 3-5 breaths per minute.