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: Gynaecology & Obstetrics
From full dilatation of cervix to complete bih of baby is? 
Select and explain. 
A. 1st stage, B. 2nd stage, C. 3rd stage, D. 4th stage
B: 2nd stage
Answer: B: 2nd stage 
Explanation: 2nd stage.