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 materials is the most ideal for\nindirect pulp capping? \nSelect and explain. \nA. Calcium hydroxide, B. Zinc oxide eugenol cement, C. Zinc oxide powder only, D. Zinc oxyphosphate cement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Calcium hydroxide remains the standard material for pulp capping of normal vital pulp tissue; it can possibly\xa0stimulate the repair reaction. A hard-setting calcium hydroxide capping material should be used. If the tooth is\xa0small (such as a first primary molar), hard-setting calcium hydroxide may also be used as the base for the restoration.\xa0 Some\xa0 studies\xa0 have\xa0 shown\xa0 successful\xa0 results\xa0 with direct capping of exposed pulps with adhesive bonding agents,\xa0 whereas\xa0 others\xa0 have\xa0 reported\xa0 pulpal\xa0 inflammation\xa0 and\xa0 unacceptable\xa0 results\xa0 with\xa0 this\xa0 technique.\nMcDONALD AND AVERY’S DENTISTRY\xa0 CHILD\xa0 \xa0ADOLESCENT 10thEd P:228', 'role': 'assistant'}]