How can I limit the selection to one answer out of four options?

I have a question with four images as options and I want to limit the answer to one, and not enable clicking on multiple options. I read something about Radio, but I cannot find that option. Please help! Thanks!

Instead of using the image picker use the image radio button, here is the link to the widget: https://widgets.jotform.com/widget/image_radio_buttons 

This guide will help you adding the widget to the form: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-Your-Form 

Thanks.