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: ENT
Most common malignant tumour of minor salivary glands 
Select and explain. 
A. Pleomorphic odenoma, B. Adenoid cystic carcinoma, C. Squamous cell carcinoma, D. Mucoepidermoid carcinoma
B: Adenoid cystic carcinoma
Answer: B: Adenoid cystic carcinoma 
Explanation: None