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
[{'content': 'Wahin tumour is: \nSelect and explain. \nA. Adenolymphoma of parotid gland, B. Pleomorphic adenoma of parotid, C. Carcinoma of parotid, D. Carcinoma of submandibular salivary gland', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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 .', 'role': 'assistant'}]