In a Title and Content slide, type a question in the Title area and answers in the Content placeholder. On the Developer tab, click Visual Basic (VB).
In the VB editor, click Insert and then Module. Type “Sub” and a Macro name, like “Correct.” Press Enter. Type “MsgBox” and in parentheses and quotes, the message you want to pop up. “End Sub” will be added automatically.
Select an answer to which you want that message to apply. On the Insert tab, in the Links group, click the Action button, select Run Macro. Select the Macro. Click the answer in presentation to see the message.