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': "How long will take for the appearance of 'marbling' in a dead body? \nSelect and explain. \nA. 18 hours, B. 36 hours, C. 12 hours, D. 24 hours", 'role': 'user'}, {'content': 'Answer: B \nExplanation: The superficial veins especially over the roots of the limb, thighs, sides of the abdomen, shoulders, chest and neck are stained greenish-brown or purplish-red (linear branching pattern) due to the hemolysis of red cells, which stains the wall of the vessel and infiltrates into the tissue, giving a marbled appearance (red, then greenish pattern in skin resembling the branches of a tree). This stas in 24 hours, but is prominent in 36-48 hours. Ref: The Essentials of Forensic Medicine and Toxicology by Narayan Reddy, 27th edition, Page 145.', 'role': 'assistant'}]