This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pre Anesthetic Evaluation, Subject name: Anaesthesia
Conscious sedation is: 
Select and explain. 
A. CNS depression with unconsciousness, B. Sedation with inability to respond to command, C. Sedation with ability to respond to command, D. Any of the above
C: Sedation with ability to respond to command
Answer: C: Sedation with ability to respond to command 
Explanation: Sedation with ability to respond to command. Dexmedetomidine is nowerdays is considered best drug for concious sedation. Dexmedetomidine * Highly selective alpha - 2 adrenoreceptor agonist * Used mainly as IV adjunct during induction and /or maintenance of general anesthetics * Minimal respiratory and cardiovascular depression * Good sedation , good analgesic, sympatholytic effects * Selectivity for alpha1: alpha 2 receptors is 1: 1640 Uses of IV anesthetic agents:- 1. Induction of anesthetics 2. Maintenance of anesthetics 3. Sedation