Which of the following statements is not correct?

Question

$\begin{array}{1 1} \text{a. All metal carbonates react with acid to give a salt, water and carbon dioxide} \\ \text{ b. All metal oxides react with water to give salt and acid} \\ \text{ c. Some metals react with acids to give salt and hydrogen} \\ \text{ d. Some non metal oxides react with water to form an acid} \end{array}$