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: Surgery
[{'content': "While performing a submandibular sialography the cannula is inserted in the following direction to prevent damage to Wharton's duct. \nSelect and explain. \nA. Upward and medial, B. Medial to lateral, C. Lateral to medial, D. Lateral and downward", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]