The oxide of a metal M was water soluble. When a blue litmus strip was dipped

The oxide of a metal M was water soluble. When a blue litmus strip was dipped in this solution, it did not undergo any change in colour. Predict the nature of the oxide.

The metal oxide (MO) is of basic in nature. It dissolves in water to form metal hydroxide as follows:

A blue litmus does not alter its colour in the basic medium.