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
Cancrum oris - all are true except - 
Select and explain. 
A. Associated with malnutrition, B. Inflammatory swelling, C. Associated with vitamin deficiency, D. None
D: None
Answer: D: None 
Explanation: Ans. is 'None'