how to display a question conditionally in questionnaire

Summary:

Content (please ensure you mask any confidential information):

We want to create a questionnaire where once the user selects 'yes' from the drop down which contains yes/no/NA, automatically a date field should pop up which will request the user to fill the date.

This should happen only once they select Yes under the drop down.

Version (include the version you are using, if applicable):

23c

Code Snippet (add any code snippets that support your topic, if applicable):