This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genital Tract Infections (Too hot to handle!), Subject name: Gynaecology & Obstetrics
[{'content': 'Most common symptom of Acute pelvic inflammatory disease: \nSelect and explain. \nA. Bleeding per vaginum, B. Abdominal pain, C. Vomiting, D. Amenorrhoea', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Symptoms of Acute PID Abdominal pain Vomiting Dysuria Vaginal discharge Abnormal uterine bleeding Pain is the most common feature of symptomatic PID. Abnormal bleeding and vomiting may also occur.', 'role': 'assistant'}]