This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ectopic Pregnancy (Hello ! Where are you ?), Subject name: Gynaecology & Obstetrics
[{'content': 'An ectopic pregnancy implanted in the ovary clinically may most closely mimic which of the following? \nSelect and explain. \nA. Ovarian torsion, B. Corpus luteum cyst rupture, C. Uterine horn pregnancy rupture, D. Interstitial ectopic pregnancy rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: * Findings of ectopic pregnancy in ovary are likely to mimic those of a tubal pregnancy or a bleeding corpus luteum. * At surgery, early ovarian pregnancies are likely to be considered corpus luteum cysts or a bleeding corpus luteum.', 'role': 'assistant'}]