I have a wizard and in one of the steps, when the user selects the item, he'll get the list of subitems based on item selected. Once he selects the subitem he can preview the details of the subitem to check if his selection is correct.
Both these lists can be huge and only one item can be selected at a time.
I am attaching the mockup. Please suggest if this mock up looks good or are there any better designs\examples available for reference. Thanks