How to allow users to select certain options in a drop down based on other field's selection?

Estimados, tengo 2 listas desplegables en donde requiero que al seleccionar una opción de una, pueda elegir solo las que necesito, trate con las condiciones pero no me permite hacerlo

Saludos cordiales

With conditions you cannot alter the options in a drop down field, but there's a widget that changes the options of the next fields based on the previous drop down selection. 

You will find the widget on this link: https://widgets.jotform.com/widget/dynamic_dropdowns 

There's also a sample form on the widgets page and you may take a look how it works before to add it to your form. To add the widget, please follow this guide: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form 

If you have any question, let us know.