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
Major complication of cysto gastrostomy for pseudo paancreatic cyst is- 
Select and explain. 
A. Infection, B. Obstruction, C. Fistula, D. Haemorrhage
D: Haemorrhage
Answer: D: Haemorrhage 
Explanation: None