Problem to group radio button across gridview rows

Why?In general no one can easily group or make a single selection from radio button list inside gridview rows. There are a lot of way to make a single or unique selection from list. Here i want to share how i can address this problem in the most easiest way. Googling the problem most of the cases i saw the grouping in horizontal way. Thats why i tried to group the radio buttons in vertical manner