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
Most common site for extra-pelvic endometriosis 
Select and explain. 
A. Rectum, B. Sigmoid colon, C. Duodenum, D. Jejunum
B: Sigmoid colon
Answer: B: Sigmoid colon 
Explanation: Most common site for extra-pelvic endometriosis is gastro-intestinal system i.e., sigmoid colon> Rectum.