Which among the following gases is used as an anesthetic in dental surgery?

Nitrous Oxide 

The correct answer is option 1. Nitrous Oxide.

The gas used as an anesthetic in dental surgery is Nitrous Oxide.

Nitrous oxide (\(N_2O\)), commonly known as laughing gas, is used as an anesthetic in dental surgery. It has analgesic (pain-relieving) and anxiolytic (anxiety-reducing) properties, making it suitable for sedating patients during dental procedures. Nitrous oxide is administered by inhalation and is widely used due to its rapid onset and relatively quick recovery time.