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
True about intrauterine fetal death (IUD) : 
Select and explain. 
A. Gas bubbles in great vessels, B. Amniotic fluid volume, C. Overlapping of skull bone, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is a, b and c i.e. Gas bubbles in great vessels; Overlapping of skull bone; and Decreased amniotic fluid volume