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': 'Burns involving skin superficial part of dermis is categorized as \nSelect and explain. \nA. First degree burns, B. Superficial 2nd degree burn, C. Deep 2nd degree burn, D. Third degree burns', 'role': 'user'}, {'content': 'Answer: B \nExplanation: First degree burns involve only epidermis\nSuperficial second degree involve upper layer of dermis\nDeep second degree involves reticular layers of dermis\nThird degree involves all layers of skin\nFourth degree burns involve not only skin but also subcutaneous fat and deeper structures', 'role': 'assistant'}]