Create a web dynpro component and design the view context with a node and three attributes under that node.
Design the view layout . Add a radio button and bind the KeyToSelect, SelectedKey and provide the text. Similarly create another UI element as radio button and bind it to the context nodes.
Provide the code in the INIT method. To make the first radio button as selected.
On each radio button we have a defined event and provide the below code in each to select that.
Create an application and test it.