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: Pathology
[{'content': 'Which of the following features distinguish Necrotizing Sialometaplasia from squamous Cell carcinoma? \nSelect and explain. \nA. Majority of intraoral cases present with ulceration and pain in the later stages, B. Varying degrees of lobar necrosis is seen, C. Squamous metaplasia of excretory ducts and acini are noted, D. Nests of squamous epithelium with several residual ductal lamina within them are noticed', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]