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': 'The following are the high grade salivary gland malignancies, except: \nSelect and explain. \nA. Basal cell adenocarcinoma, B. Mucoepidermoid carcinoma, C. Adenoid cystic carcinoma, D. Salivary duct carcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Basal\xa0cell\xa0adenocarcinoma\xa0of\xa0salivary\xa0glands\xa0is\xa0an uncommon neoplasm occurring almost exclusively in\xa0major\xa0salivary\xa0glands.\xa0It\xa0is\xa0a\xa0low-grade\xa0malignant neoplasm,\xa0cytologically similar to basal cell adenoma, but is infiltrative and has a small potential for metastasis.\nReference: Shafer’s Textbook of ORAL PATHOLOGY Eighth Edition page no 285', 'role': 'assistant'}]