This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Glands, Subject name: Surgery
Which of the the following is true about adenoid cystic carcinoma : 
Select and explain. 
A. Most common malignant tumor in minor salivary glands, B. Most common site is sinonasal tract, C. Most commonly involved nerve is trigeminal, D. Most common site of metastasis is liver
A: Most common malignant tumor in minor salivary glands
Answer: A: Most common malignant tumor in minor salivary glands 
Explanation: Adenoid cystic carcinoma: Most common malignant tumor in submandibular, sublingual and minor salivary glands Most common site is hard palate > sinonasal tract Most common site of metastasis is lungs AKA - Tracherous tumor - tumor is malignant but appear benign Most common type is- Cribriform variety - has swiss cheese pattern Has neurotrophic propey -Most commonly involved nerve is Facial nerve > trigeminal Tumor invades Haversian system of long bones Treatment: Excision with widest cuff of normal tissue Post operative - Prevent recurrence