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': 'Ethoxy benzoic acid increases the strength and solubility of the cement: \nSelect and explain. \nA. Zinc oxide eugenol, B. Polycarboxylate cement, C. Zinc phosphate cement, D. Silicate cement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Modifications\xa0have\xa0been\xa0made\xa0to\xa0improve\xa0the strength\xa0and\xa0abrasion\xa0resistance\xa0of\xa0 ZOE\xa0cement\xa0for\xa0long-term luting. One system substitutes orthoethoxybenzoic acid (EBA) for part of the eugenol liquid, and includes alumina in the powder. Another system (ZOE plus polymer) consists of eugenol\xa0liquid\xa0and\xa0a\xa0special\xa0powder\xa0containing\xa0of\xa020%\xa0 to 40% by weight of fine polymer particles and zinc oxide particles that have been surface treated with carboxylic acid.\nPhillips 12 ed pg 331', 'role': 'assistant'}]