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': 'Schwangerschafts protein 1 (SP1), is a biochemical marker of- \nSelect and explain. \nA. Gestatinal trophoblastic disease, B. Ectopic pregnancy, C. Placenta accreta, D. Severe PIH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Schwangerschafts protein 1 (SP1), also known as pregnancy-associated plasma protein C (PAPP-C) or pregnancy-specific b-glycoprotein (PSBS), is produced by the syncytiotrophoblast . It is a biochemical marker of Ectopic pregnancy', 'role': 'assistant'}]