Selecting options

Question

have 2 main option. If I select 1St option it will display all it's child's.and if I select 2nd it displays it's child options. I want to display child options which has certain value. If their is no value then it should not be able to select that option. Options are generated using radio buttons.

Answer 1

Maheshwari B the link below explains what you need...
https://css-tricks.com/solved-with-css-dropdown-menus