This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: ENT
Most common site of origin of pleomorphic adenoma is: 
Select and explain. 
A. Parotid gland, B. Submandibular salivary gland, C. Minor salivary glands of soft and hard palate, D. Minor salivary glands of lip
A: Parotid gland
Answer: A: Parotid gland 
Explanation: Pleomorphic adenoma most commonly arises from the parotid gland. Ninety per cent are located in the superficial lobe while 10% involve deep lobe and present as parapharyngeal tumours.