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
'Limb salvage' primarily depends on - 
Select and explain. 
A. Vascular injury, B. Skin cover, C. Bone injury, D. Nerve injury
A: Vascular injury
Answer: A: Vascular injury 
Explanation: Ans. is 'a' i.e., Vascular injury It is not possible for any tissue to survive without a vascular supply