Hi,

Use For Loop

for(int i=0;i<ds.Tables[0].Rows.Count;i++)
{
Question.Text = ds.Tables[0].Rows[i][1].ToString();
ans1.Text = ds.Tables[0].Rows[i][3].ToString();
ans2.Text = ds.Tables[0].Rows[i][4].ToString();
ans3.Text = ds.Tables[0].Rows[i][5].ToString();
ans4.Text = ds.Tables[0].Rows[i][6].ToString();
}