This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prenatal Diagnosis, Subject name: Gynaecology & Obstetrics
[{'content': "Alpha-feto-protein levels are lowered in: \nSelect and explain. \nA. Down's syndrome, B. Renal anomalies, C. Anterior abdominal wall defects, D. Anencephaly", 'role': 'user'}, {'content': "Answer: A \nExplanation: Decreased alpha feto proteins are seen in conditions like, Down's syndrome Intra uterine death Trophoblastic conditions Overestimated gestational age.", 'role': 'assistant'}]