Most user friendly way to represent radio button with sub options

1. What can I use instead of radio buttons?
2. Can radio button have more than 2 options?
3. Under what circumstances is a select menu used instead of a radio button group?

What can I use instead of radio buttons?

Checkboxes, like radio buttons, present multiple options in a list. Unlike radio buttons, however, they allow you to choose more than one option. When you should use checkboxes: If you want users to select multiple options.

Can radio button have more than 2 options?

Radio buttons allow a user to select a single option among multiple options. You can set the Choice Value of each option, for each button, as well as group these buttons by giving them the same Group Name.

Under what circumstances is a select menu used instead of a radio button group?

A select dropdown is recommended when there are more than 7 options available because the form becomes cluttered and long. However, if the user almost always needs to the change the value (the default is rarely right), then you may want radio buttons even if there are more than 7 options.