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
Estimation of maternal serum alpha-fetoprotein helps in diagnosis of all except : 
Select and explain. 
A. Tracheoesophageal fistula, B. Spina bifida, C. Fetal hepatitis, D. Anencephaly
C: Fetal hepatitis
Answer: C: Fetal hepatitis 
Explanation: Fetal hepatitis