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
Ludwig angina is usually caused by 
Select and explain. 
A. Streptococci and various mixed anaerobes, B. Anaerobic	infection	by	prevotella	and fusobacterium, C. Paramyxovirus, D. Candida species
A: Streptococci and various mixed anaerobes
Answer: A: Streptococci and various mixed anaerobes 
Explanation: None