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
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 
Select and explain. 
A. 3 days, B. 4 days, C. 6 days, D. 7 days
D: 7 days
Answer: D: 7 days 
Explanation: 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.