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: Surgery
[{'content': 'Example of cold burn is /are: \nSelect and explain. \nA. Frostbite, B. Trench foot in soldiers., C. Immersion foot occurring in shipwrecked persons., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cold burns include\n\nFreezing injuries (frostbite)\nNon-freezing cold injuries e.g. chilblain (localized painful erythema in the fingers, toes or ears produced by cold damp weather)\nTrench foot seen in soldiers\nImmersion foot occurring in shipwrecked persons.', 'role': 'assistant'}]