radio button List item in Datagrid

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Hai

I need to add listitem to each child row in a datagrid for radiobuttonlist
available in each parent row in a datagrid.

(I need to show datagrid with questions as parent row and answers in child
row. Child row to have list item dynamically generated for every question row)

Note: List item is available in each row

How can i achieve this.

Regards
Suresh