This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Anatomy
[{'content': "Spalding's ring is seen in : \nSelect and explain. \nA. Still born, B. Live born, C. Premature, D. Dead born", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Spalding sign : It is the irregular overlapping of the cranial bones on one another, due to liquefication of brain matter and softening of the ligamentous structures suppoing the vault. Appears 7 days after death. Ref: Datta Obs 9e pg 303.', 'role': 'assistant'}]