Laughing gas - used as a mild anesthetic

• A. Larynx
• B. Maggot(s)
• C. Nitrous oxide
• D. Livor Mortis

Answer: (C)

Laughing gas is nitrous oxide, a gas used as a mild anesthetic and analgesic. When inhaled, it can produce a quick sense of euphoria and giggling, which is why it’s popularly called laughing gas. Its effects come on rapidly and wear off quickly because it is only modestly soluble in blood, allowing clinicians to titrate the level of anesthesia. It’s commonly used in dentistry and for minor procedures where light sedation is enough. The other options aren’t related to anesthesia: the larynx is the voice box, maggots are organisms involved in decomposition and forensic analysis, and livor mortis is the postmortem settling of blood. So nitrous oxide best fits the description.