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
Warthins tumor is 
Select and explain. 
A. An adenolymphoma of the parotid gland, B. A pleomorphic adenoma of parotid gland, C. Carcinoma of the parotid gland, D. None of the above
A: An adenolymphoma of the parotid gland
Answer: A: An adenolymphoma of the parotid gland 
Explanation: None