Check data retrive from database in radio button in data list

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C#

ASP.NET

hi, I use asp.net C#
I have table contain

(question
option1
option 2
option3
answer)

I put question with options in data list from database
but i face a problem
how can I access radio button in data list?

and check if the radio button checked is true or false
by match the radio with answer field

What I have tried:

i try this code to check the radio button, but i see when i checked radio button 2 it is work only.
i want to match the checked with database !!

int total=0;
for (int i = 0; i < 3; i++)
{
RadioButton rbtnlist = (RadioButton)DataList1.Items[i].FindControl("RadioButton2");
if (rbtnlist.Checked)
{
total = total + 1;
}
}
Label2.Text = total.ToString();