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
Commonest cause of Ludwig's Angina is 
Select and explain. 
A. Dental infection of canine tooth, B. Dental infection of 2nd molar teeth, C. Dental infection of 2nd premolar teeth, D. Dental infection of Incisor teeth
B: Dental infection of 2nd molar teeth
Answer: B: Dental infection of 2nd molar teeth 
Explanation: Commonest cause of Ludwig's angina is dental infection of 2nd and 3rd molar teeth.