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
Lymphoid tissue is seen in which parotid tumor - 
Select and explain. 
A. Pleomorphic adenoma, B. Wahins tumor, C. Adenoid cystic, D. Mucoepidermoid
B: Wahins tumor
Answer: B: Wahins tumor 
Explanation: 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).