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': 'Heterotopic pregnancy is \nSelect and explain. \nA. Pregnancy occurring in both tubes, B. Extrauterine and intrauterine pregnancy, C. Ovarian and tubal pregnancy, D. Cervical pregnancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A heterotopic pregnancy is a rare complication of pregnancy in which both extra-uterine (ectopic pregnancy) and intrauterine pregnancy occur simultaneously. Incidence of this has now increased to around 1 in 3000 pregnancies due to the advent of IVF. It may also be referred to as a combined ectopic pregnancy /multiple sited pregnancy, or co-incident pregnancy.', 'role': 'assistant'}]