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
[{'content': 'Which of these is NOT a pair of salivary glands? \nSelect and explain. \nA. Parotid, B. Submandibular, C. Submucosal, D. Sublingual', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A:\xa0The largest of the salivary glands, the\xa0parotid glands, are serious glands located just anterior to each ear. Parotid ducts enter the oral cavity adjacent to the second upper molars.\nB:\xa0The\xa0submandibular glands\xa0produce more serious than mucous secretions. Each gland can be felt like a soft lump along the inferior border of the mandible. The submandibular ducts open into the oral cavity on each side of the frenulum of the tongue.\nD:\xa0The sublingual glands, the smallest of the three paired salivary glands, produce primarily mucous secretions. They lie immediately below the mucous membrane in the floor of the oral cavity', 'role': 'assistant'}]