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
[{'content': 'Most common etiology for pain in lower abdomen in young females: \nSelect and explain. \nA. Mittelschmerz, B. PID, C. Appendicitis, D. Torsion of cyst', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]