This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thermal injuries, Subject name: Forensic Medicine
[{'content': 'Feature of ruptured skin caused by excessive heat \nSelect and explain. \nA. Irregular margin, B. Clear regular margin, C. Contused margin, D. Abraded margin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: HEAT RUPTURE HAS IRREGULAR MARGINS WITH NO CONTUSION OR ABRASION Heat rupture/ splits Skin splits occurring due to severe burning/ charring Irregular margins Sites: Fleshy areas, Extensor surfaces & joints. Multiple, Large (several centimeters) Resembles incised or lacerated wounds. Intact nerves, blood vessels in the floor of heat rupture. Bleeding is absent Vital reaction is absent', 'role': 'assistant'}]