This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Skin, Subject name: Skin
[{'content': 'Fat is present in relation to which anatomical structure? \nSelect and explain. \nA. Epidermis, B. Dermis, C. Sub-cutaneous tissue, D. Nail bed', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Sub-cutaneous tissueRef: Rooks 8th ed p 3.53, Roxburgh's common skin diseases 17th ed p. 1", 'role': 'assistant'}]