<prompt> Most common malignant parotid tumour isOncocytomaWahins tumourAdenoid cystic carcinomaMucoepidermoid carcinoma  <response>: Among primary parotid malignant tumors, mucoepidermoid carcinoma is the most common, followed by adenocystic carcinoma. Reference : Bailey love, 27th Edition, page no 789. 