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': 'Heterotopicpregnancy - \nSelect and explain. \nA. Incidence is l0%, B. Occurs following assisted reproductive techniques, C. Has two extrauterine gestational sacs, D. Has one gestational sac in fallopian tube and other intrauterine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is'b'i.e., Occurs following assisted reproductive techniques Heterotopic pregnancyIt is the rare simultaneous existence of intrauterine and extrauterine gestational sacs.Itisararecomplicationofmultiplepregnancy,butitsincidenceincreasestol% ofthepregnanciesfollowingassistedreproductive techniques.", 'role': 'assistant'}]