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
Alpha feto protein is increased in all except 
Select and explain. 
A. Chromosomal trisomy, B. Cloaca' exstrophy, C. Exomphalos, D. Tracheo-oesophageal fistula
A: Chromosomal trisomy
Answer: A: Chromosomal trisomy 
Explanation: Chromosomal trisomy