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': 'True about intrauterine fetal death (IUD) : \nSelect and explain. \nA. Gas bubbles in great vessels, B. Amniotic fluid volume, C. Overlapping of skull bone, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is a, b and c i.e. Gas bubbles in great vessels; Overlapping of skull bone; and Decreased amniotic fluid volume', 'role': 'assistant'}]