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 one of the following dental cement accelerates the formation of reparative dentin? \nSelect and explain. \nA. Eugenol, B. Calcium hydroxide, C. Zinc oxide, D. Silica', 'role': 'user'}, {'content': 'Answer: B \nExplanation: BIOLOGICAL PROPERTIES OF Ca(OH)2\xa0:\nEffect on pulp:\nThe cement is alkaline in nature. The high pH is due to the presence of free Ca(OH)2 in the set cement. The pH ranges from 9.2 to 11.7\nFormation of secondary dentin:\xa0\nThe high alkalinity and its consequent antibacterial and protein lysing effect helps in the formation of reparative dentin.\nRef: Mannapalli ed 3\xa0 pg 80', 'role': 'assistant'}]