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': 'Thickness of split grafts commonly used in oral and maxillofacial region: \nSelect and explain. \nA. Upto 0.3mm, B. 0.6 mm, C. 0.3-0.5 mm, D. >0.6 mm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The split thickness graft consists of epidermis and the superficial part of dermis, thus containing few skin appendageal structures. The grafts are classified as thin (upto 0.3mm), medium (0.4 — 0.5mm) and thick (about 0.6mm). Split grafts of 0.3 to 0.5mm thickness are commonly used in oral and maxillofacial procedures.', 'role': 'assistant'}]