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
True regarding AV fistula is - 
Select and explain. 
A. Leads to cardiac failure, B. Causes local gigantism, C. Can cause ulcers, D. All
D: All
Answer: D: All 
Explanation: Answer 'a' i.e. Leads to cardiac failure; 'b' i.e. Causes local gigantism; 'c' i.e. Can cause ulcers