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': 'Estimation of maternal serum alpha-fetoprotein helps in diagnosis of all except : \nSelect and explain. \nA. Tracheoesophageal fistula, B. Spina bifida, C. Fetal hepatitis, D. Anencephaly', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Fetal hepatitis', 'role': 'assistant'}]