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': "'Limb salvage' primarily depends on - \nSelect and explain. \nA. Vascular injury, B. Skin cover, C. Bone injury, D. Nerve injury", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vascular injury It is not possible for any tissue to survive without a vascular supply", 'role': 'assistant'}]