This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Von Ebner glands are mainly present in? 
Select and explain. 
A. Palate, B. Buccal mucosa, C. Tongue, D. Posterior pharyngeal wall
C: Tongue
Answer: C: Tongue 
Explanation: The posterior lingual serous gland also known as von Ebner's glands is a minor salivary gland located in the epithelium of the trough circling the circumvallate papillae on the dorsal surface of the tongue near the terminal sulcus. Ref: Orban's oral histology and embryology, 13th edition.