How to add an option that user can answer a written a test by radio buttons

Hello sir,
my website is https://www.pakchristian.com and i want to add an option for users/subscribers that they can answer some tests and that test should come to us via email that can be checked by us.

sample of that test is available at https://www.pbcipk.org/lesson1.html
kindly visit that and please help me out and guide me that how i may do this to my mentioned above website.
your guideline and advise will be highly appreciated.

thanks in anticipation