Which of the following statement regarding nitrous oxide is not correct ?

Question

$\begin{array}{1 1} \text{The solubility of} N_2O \text{is more in cold solution as compared to a hot solution } \\ \text{The solubility of} N_2O \text{is more in hot solution as compared to a cold solution } \\ \text{The gas} N_2O \text{is known as laughing gas} \\ \text{Nitrogen oxide mixed with oxygen is used as an anesthetic} \end{array}$