This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Glands, Subject name: Pathology
Wahin tumour is: 
Select and explain. 
A. Adenolymphoma of parotid gland, B. Pleomorphic adenoma of parotid, C. Carcinoma of parotid, D. Carcinoma of submandibular salivary gland
A: Adenolymphoma of parotid gland
Answer: A: Adenolymphoma of parotid gland 
Explanation: Wahin Tumor: Papillary Cystadenoma Lymphomatosum Benign neoplasm of salivary gland Arises almost exclusively in parotid gland Round to oval encapsulated masses, 2 to 5 cm in diameter M/E -These spaces are lined by a double layer of neoplastic epithelial cells which might have germinal centres, resting on a dense lymphoid stroma .