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': 'Type 2 pattern of etched enamel is also known as: \nSelect and explain. \nA. Honeycomb pattern, B. Soap bubble pattern, C. Cobble stone pattern, D. Pyramid pattern', 'role': 'user'}, {'content': 'Answer: C \nExplanation: According to Silverstone et al and Galil Wright\xa0\nType I\n\nSelective removal of enamel prism cores.\nPeripheries intact (honeycomb appearance).\n\nType II\xa0\n\n\xa0Reverse process.\n\xa0Peripheries removed.\n\xa0Cores intact (cobble stone appearance\xa0 with prism edges lost).\n\nType III is the mixture of pattern I and II.\nType IV\xa0–\xa0Pitted enamel with map like appearance.\nType V – flat smooth surfaces', 'role': 'assistant'}]