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': 'Lymphoid tissue is seen in which parotid tumor - \nSelect and explain. \nA. Pleomorphic adenoma, B. Wahins tumor, C. Adenoid cystic, D. Mucoepidermoid', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer- B. Wahins tumorOn microscopic examination, cystic spaces are lined by a double layer of neoplastic epithelial cells resting on a dense lymphoid stroma.Wahin's tumor is the 2nd most common salivary gland neoplasm (after pleomorphic adenoma).", 'role': 'assistant'}]