This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and Investigations, Subject name: Forensic Medicine
[{'content': "Earliest sign of fetal death - \nSelect and explain. \nA. Spalding sign, B. Robert's sign, C. Ball sign, D. Adipocere formation", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Robert's sign Radiological signs of IUFDSignInterval (After Death)Robert sign (gas in great vessels)12 hSpalding sign (overlapping of skull bones)1 weekBlair-Hartley/ Ball sign (hyperflexion/ hyperextension of spine with overcrowding of ribs3-4 weeks", 'role': 'assistant'}]