An inorganic compound X of an alkali metal on heating gives a reddish-brown gas Y and a binary solid Z. This solid is less soluble in water and its solution is basic. X does not give a positive silver nitrate test. X can be identified as

A

$$\text{KIO}_3$$

B

$$\text{LiNO}_3$$

C

$$\text{NaNO}_3$$

D

$$\text{KNO}_2$$