Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Carbon forms two important oxides – $\text{CO}$ and $\text{CO}_2$. $\text{CO}$ is neutral whereas $\text{CO}_2$ is acidic in nature.
Reason R: $\text{CO}_2$ can combine with water in a limited way to form carbonic acid, while $\text{CO}$ is sparingly soluble in water.
In the light of the above statements, choose the most appropriate answer from the options given below: