This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'USG abdomen of a 30-year-old SLE patient who cannot feel her baby moving for past 7 days. Earliest appearance of spalding sign is at \nSelect and explain. \nA. 3 days, B. 4 days, C. 6 days, D. 7 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Image Courtesy- Case courtesy of A.Prof Frank Gaillard, https://radiopaedia.org/cases/8266 * Anti-phospholipid antibody syndrome explains the I.U.D* The irregular overlapping of the cranial bones on one another- spalding sign is due to liquefaction of the brain matter and softening of the ligamentous structures supporting the vault. It usually appears 7 days after death. Similar features may be found in extra-uterine pregnancy with the foetus alive.', 'role': 'assistant'}]