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
Spontaneous rhythmic respiration initiated in 
Select and explain. 
A. Pre-Botzinger complex, B. Dorsal respiratory group, C. Pneumataxic centre, D. Apneusic centre
A: Pre-Botzinger complex
Answer: A: Pre-Botzinger complex 
Explanation: A i.e. Pre-Botzinger complex