Create a Drupal page with a registration form to register students in a college.
The fields should present in the form are 'Full Name', 'Date of Birth', 'Country', 'State', 'Zip Code'.
'Country' and 'State' are drop down and while selecting the country, state drop down should change according to the country.
While submitting the form, form validation should be there. Achieve the submission using AJAX