This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pelvic Inflammatory Disease, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common cause of pelvic inflammatory disease is - \nSelect and explain. \nA. Sexually transmitted disease, B. IUCD, C. Pelvic peritonitis, D. Puerperal sepsis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Sexually transmitted disease Etiology of Pelvic Inflammatory Diseaseo Sexually transmitted disease is the most common cause. Gonococcal and chlamydial infections are the most common cause.o Postabortal or puerperal sepsiso IUCDo Tuberculosiso Pelvic peritonitis, due to appendicitis and diverticulitis.", 'role': 'assistant'}]