Answer:
[tex]A[/tex]Explanation:
Here, we want to select which of the options represent the property of an acid
An acid like hydrochloric acid reacts with metallic elements (for example, group 2 elements) like magnesium to produce hydrogen gas and the corresponding metallic salt
We can see that as follows:
[tex]Mg_{(s)}+2HCl_{(aq)}\text{ }\rightarrow MgCl_{2(aq)}+H_{2(g)}[/tex]Thus,the correct option here is that A mineral acid react with some metals to produce hydrogen gas
