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: Dental
[{'content': 'Impression material of choice in patients with oral submucous ﬁbrosis is: \nSelect and explain. \nA. ZOE paste, B. Addition silicone, C. Condensation silicone, D. Impression plaster', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In OSMF patients as the mucosa is fibrosed, one needs to take proper care during impression:\n\nZOE would be irritating to fibrosed tissues.\nImpression plaster has poor handling properties and flow.\nCondensation silicone is dimensionally less stable than addition silicone due to by-product formation.\nAddition silicone is the best suited material due to its dimensional stability, flow and handling properties. It is non-irritating to the tissues.', 'role': 'assistant'}]