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': 'Example of filler particle is/are: \nSelect and explain. \nA. Silica, B. Quartz, C. Glass particles, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dispersed phase of composite resins is made up of\xa0inorganic filler material.\nCommonly used fillers are silicon dioxide, boron silicates and lithium aluminium silicates.\nIn some composites, quartz is partly replaced with heavy metal particles like quartz, glass particles, zinc, aluminium, barium, strontium or zirconium.\xa0\nFiller content ranges from 30% to 50% by volume and 50% to 85% by weight.\n\nRef: Textbook of Operative Dentistry, Nisha and Amit Garg, 3rd edition, Pg no:253', 'role': 'assistant'}]