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
[{'content': 'A woman presents with amenorrhoea of 2 months duration; lower abdominal pain, facial pallor, fainting duration; lower abdominal pain, facial pallor, fainting \nSelect and explain. \nA. Ruptured ovarian cyst, B. Ruptured ectopic pregnancy, C. Threatened abortion, D. Septic abortion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]