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
Gangrene of intestine is seen in all the following conditions, except 
Select and explain. 
A. Tricuspid Valve Endocarditis, B. Shock, C. Mesenteric Artery Thrombosis, D. Volvulus
A: Tricuspid Valve Endocarditis
Answer: A: Tricuspid Valve Endocarditis 
Explanation: Shock, mesenteric artery thrombosis and volvulus can lead to gangrene of intestine.