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: Dental
The duct(s) of gland(s) opening into the floor of the mouth is (are): 
Select and explain. 
A. Submandibular and sublingual, B. Submandibular and parotid, C. Sublingual and parotid, D. Von Ebner
A: Submandibular and sublingual
Answer: A: Submandibular and sublingual 
Explanation: None