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': 'The pathognomonic feature of abdominal pregnancy is : \nSelect and explain. \nA. Fetus appears lateral to lumbar spine on X-ray, B. Small uterus, C. Fetus easily palpable, D. Positive pregnancy test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fetus appears lateral to lumbar spine on X-ray', 'role': 'assistant'}]