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 of filler particle used in packable composite: \nSelect and explain. \nA. Fibrous filler particles, B. Microcrystalline filler particles, C. Mixture of both, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Specifically\xa0the\xa0packable/condensable\xa0characteristics\xa0are\xa0derived from the inclusion of elongated, fibrous filler particles\xa0of about 100 µm in length and/or rough-textured surfaces or\xa0branched\xa0geometries\xa0that\xa0tend\xa0 to\xa0interlock\xa0and\xa0resist\xa0flow.\nPhillips Dental materials 12th edition pg no 286', 'role': 'assistant'}]