Ok.
Steps:
1. Get the answers from DB for the given question (separately or in one shot along with question)
2. You should have a dataset with 4 answers.
3. Use this to bind the radiobutton the way you like - pick one by one if you want
For data, lets say, you run a query and get data related to this question from DB, something like:
SELECT question, answer1, answer2, answer3, answer4
FROM myQTable
WHERE sno = 1
Try!