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': 'A drug which is not used to provide conscious sedation\nin a child is \nSelect and explain. \nA. Nitrous Oxide, B. Chloral Hydrate, C. Hydroxyzine, D. Lincomycin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]