Correct Answer: Nitrogen oxide

Solution : The correct option is Nitrogen oxide.

Nitrous oxide (N ₂ O) is a colourless, odourless gas with the chemical formula N ₂ O . It is commonly referred to as "Laughing Gas" due to the euphoric and sometimes giggly effects it can produce when inhaled in small quantities. The name comes from the fact that, when used recreationally or in medical settings, it can induce a sense of euphoria and laughter.