Hi Saiprasad,
Please take a look at the Combo Box widget. This suits your usecase and both 1-* and *-* can be used with this single widget.
The Studio Pro version should be 10.7.0 or higher. You can upgrade your project to the MTS version in 10.
ATB!!
Mendix Documentation: https://docs.mendix.com/appstore/widgets/combobox/https://docs.mendix.com/appstore/widgets/combobox/
Thanks for your response. Actually i was using the widget/input element "Input Reference Set Selector" mentioned in the learning path course. I will try your suggestion too.