Which of the following statements about nitrous oxide is true?

Nitrous oxide is commonly used in its gas form for various medical and dental procedures, particularly as a sedative and analgesic. In dentistry, it is favored for its effectiveness in alleviating pain and anxiety, providing a calming effect for patients during treatment. Administering nitrous oxide allows for quick onset and recovery, enhancing patient comfort while being minimally invasive.

The other options suggest incorrect forms or states for the use of nitrous oxide. It does not have to be in solid or liquid form for effective application; rather, its gaseous state is what makes it suitable for inhalation. Additionally, nitrous oxide is not used at extremely high pressures; it is administered at safe and controlled pressures to ensure patient safety and optimal efficacy during procedures.