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: Unknown
[{'content': 'The most common site of implantation in ectopic pregnancy is - \nSelect and explain. \nA. Ampulla, B. Fimbriae, C. Body, D. Infundibulum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans-A Ampulla .The most common site of ectopic pregnancy is a fallopian tube (as if and in fallopian tube the most common site is Ampulla (55%).Sites of ectopic pregnancy in fallopian tube in decreasing order of frequency :AmpullaIsthmusInfundibulumInterstitial', 'role': 'assistant'}]