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
True regarding endo-metriosis associated dysmenorrhea is all except 
Select and explain. 
A. More severe than primary dysmenorrhea., B. Occurs 24 to 48 hours after start of menses., C. Less responsive to NSAIDs., D. Deep infiltrating endometriosis correlates with severity of dysmenorrhea.
B: Occurs 24 to 48 hours after start of menses.
Answer: B: Occurs 24 to 48 hours after start of menses. 
Explanation: Endometriosis associated dysmenorrhea typically precedes menses by 24 to 48 hours.