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: Pathology
The fascial spaces involved in Ludwig's angina are 
Select and explain. 
A. Unilateral -submandibular & sublingual spaces, B. Bilateral - submandibular & sublingual spaces, C. Unilateral - submandibular, sublingual & submental spaces, D. Bilateral -submandibular, sublingual & submental spaces
D: Bilateral -submandibular, sublingual & submental spaces
Answer: D: Bilateral -submandibular, sublingual & submental spaces 
Explanation: None