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': 'Thierch graft consists of \nSelect and explain. \nA. Only epidermis, B. Epidermis and entire dermis, C. Epidermis and variable portion of dermis, D. Dermis and subcutaneous tissue', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thiersch graft is a split thickness skin graft and therefore consists of epidermis and variable portion of dermis.', 'role': 'assistant'}]