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
Ethoxy benzoic acid increases the strength and solubility of the cement: 
Select and explain. 
A. Zinc oxide eugenol, B. Polycarboxylate cement, C. Zinc phosphate cement, D. Silicate cement
A: Zinc oxide eugenol
Answer: A: Zinc oxide eugenol 
Explanation: Modifications have been made to improve the strength and abrasion resistance of  ZOE cement for long-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 liquid and a special powder containing of 20%  to 40% by weight of fine polymer particles and zinc oxide particles that have been surface treated with carboxylic acid.
Phillips 12 ed pg 331