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
A drug which is not used to provide conscious sedation
in a child is 
Select and explain. 
A. Nitrous Oxide, B. Chloral Hydrate, C. Hydroxyzine, D. Lincomycin
D: Lincomycin
Answer: D: Lincomycin 
Explanation: None