A: You can create quizzes by assigning score for each option (e.g. A=1, B=2, C=3 etc in each question) using Calculator and then show relevant thank you screens based on the total scores using visibility logic. It is not possible to make the quizzes in Android app.

Help - https://help.getformly.com/en/articles/9317047-create-a-quiz

Also, you can send conditional email notifications based on score.
https://help.getformly.com/en/articles/9236720-email-notifications

Note - Currently it is not possible to have variables/category wise score or automatically show the results based on the most selected option. This will be available within next couple of months.