Duplicate value in Item

[81093507689]

in textfield i have 3 items
["A","B","A"]
at that time when i select third option its going automatic first option

[hackiftekhar]

That's correct. You should set unique items in the list, otherwise you may have to modify it a little bit something like below by adding an space etc
["A", "B", "A "]

and tackle the selection by it's index