This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
The initiation of the first breath in a newborn is due to: 
Select and explain. 
A. |pH; |PaO2; |PaCO2, B. |pH; |PaO2; |PaCO2, C. |pH; |PaO2, |PaCO2, D. |pH; |PaO2, |PaCO2
B: |pH; |PaO2; |PaCO2
Answer: B: |pH; |PaO2; |PaCO2 
Explanation: b. |pH;|PaO2 ;|PaCO2 (Ref: AAP guidelines 2015, Ghai 8/e p 126-133)Hypoxia, hypercapnia & acidosis = Respiratory center in the brain stimulated = Breathing