This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Most common etiology for pain in lower abdomen in young females: 
Select and explain. 
A. Mittelschmerz, B. PID, C. Appendicitis, D. Torsion of cyst
B: PID
Answer: B: PID 
Explanation: Ans. (b) PIDRef: Bailey and Love 26th edition, Page 1205* Most common cause of pain in lower abdomen in females is pelvic inflammatory disease.* Typically, pain is bilateral and lower than in acute appendicitis