Survey service: capitals of states

It is necessary to develop a service for conducting surveys. The provided link displays the survey title, its description, and a list of questions with answer options. For each question, one option must be selected; the correct answer is not considered. It is required to design the structure of models for storing data in the database.

Example questions and answer options:

What is the capital of Germany? Berlin * Hamburg Munich Cologne

What is the capital of Thailand? Nonthaburi Phetchaburi Bangkok Chiang Mai