Hi @mmukhanya!
I would guess that you are having a problem that relates to how you have done the choices for the select_one. If you use a select_one and integers as the data values, it causes problems, you need to use select_one_integer or put the data values in quotes if you use select_one, for example, “2”
See also: Showing wrong Choice option as selected ODK-X - #2 by elmps2018