It's Simple
Read the question and the options carefully. You may find the subject name and difficulty level (out of 10) in top corners.
![question image](/_next/image?url=https%3A%2F%2Fsysoi.com%2Fassets%2Fimages%2Fias%2Fquestion-options.png&w=828&q=75)
Click on the option to select, you may change your selection before clicking on submit button, once satisfied with your choice click on submit button.
![question image](/_next/image?url=https%3A%2F%2Fsysoi.com%2Fassets%2Fimages%2Fias%2Fselect-answer.png&w=828&q=75)
Check your answer, explanation then go to next question.
![question image](/_next/image?url=https%3A%2F%2Fsysoi.com%2Fassets%2Fimages%2Fias%2Fanswer-next.png&w=828&q=75)