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': 'Which of the following core material resists condensation pressure well enough? \nSelect and explain. \nA. Resin modiﬁed GIC, B. Admixed amalgam, C. Ceramic, D. Composite', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Core with admixed amalgam can be build without post retained through chamber retention\xa0(that is\xa0amalcore).\nIn 1980, Nayyar and Walton described the amalcore, or coronal-radicular or admixed amalgam restoration. This technique advocates the removal of gutta-percha (2.0–3.0 mm) from the coronal third of the obturated root canals followed by core buildup into this space along with the pulp chamber space. These intraradicular extensions of the core material act as effective retentive aids. The coronal-radicular build-up has proved to be a predictable and cost-effective restorative modality for posterior endodontically treated teeth.', 'role': 'assistant'}]