Hi Parvind,
You should put this macro into Redirect to URL: field on General tab in specific form: {% DropdownCodeName.Value |(identity)GlobalAdministrator%}
. If this field does not exist on base form (only on alternative), then submission for base form won't work correctly. If you want this to work for both cases, field must be included in alternative and on base form.
Best regards,
Dragoljub