This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
Most common malignant tumor of salivary glands 
Select and explain. 
A. Pleomorphic adenoma, B. Wahin tumor, C. Adenoid cystic carcinoma, D. Mucoepidermoid carcinoma
D: Mucoepidermoid carcinoma
Answer: D: Mucoepidermoid carcinoma 
Explanation: BENIGN MALIGNANT Pleomorphic adenoma(50%) Mucoepidermoid carcinoma(15%) Wahin tumor(5%) Acinic cell carcinoma (6%) Oncocytoma(2%) Adenocarcinoma NOS(6%) Cystadenoma(2%) Adenoid cystic carcinoma(4%) Basal cell adenoma(2%) Malignant mixed tumor(3%) TEXT BOOK OF ROBINS BASIC PATHOLOGY NINTH EDITION PAGE.556