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
All are true about spasmodic dysmenorrhea EXCEPT: 
Select and explain. 
A. Present just before menstruation, B. Present after day of menstrual period, C. The pain may persist for 12 to 24 hours, D. Dyspareunia
A: Present just before menstruation
Answer: A: Present just before menstruation 
Explanation: Present just before menstruation