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
Engagement in primigravida occurs at : 
Select and explain. 
A. Beginning of labour, B. 36 weeks, C. 34 weeks, D. Second stage of labour
A: Beginning of labour
Answer: A: Beginning of labour 
Explanation: Beginning of labour