This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Reconstructive Techniques, Subject name: Surgery
[{'content': 'Skin grafting done on wound following major skin taken from twin brother - \nSelect and explain. \nA. Isograft, B. Allograft, C. Autograft, D. Xenograft', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e.,Isograft", 'role': 'assistant'}]