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: Forensic Medicine
[{'content': "Presence of gas shadow in the hea and great vessels suggestive of intrauterine death. This is called: KCET12 \nSelect and explain. \nA. Chadwick's sign, B. Osiander's sign, C. Robe's sign, D. Spalding sign", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. Robe's sign", 'role': 'assistant'}]