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
Which tumour does not occur in minor salivary gland? 
Select and explain. 
A. Pleomorphic adenoma, B. Adenocarcinonna, C. Mucoepidermoid carcinoma, D. Warthin's tumour
D: Warthin's tumour
Answer: D: Warthin's tumour 
Explanation: None