How to set tooltips on each items in a combobox except first item

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C#

XAML

WPF

Telerik

i am using telerik wpf controls
here is my code snippet from wpf xaml file please have a look.
I am using using binding to populate combobox.
i want to set tootips on each items in a comboox except first item
myt itemd are static there will be only 4 items there
item1 "Select"
item2 "Reconciliation"
item2 "Review"
item2 "History"


<ComboBox
x:Name="cmbBankReconciliationFunction"
IsEditable="True"
IsReadOnly="True"
ItemsSource="{Binding BanckReconciliationFunctions}"
SelectedValue="{Binding SelectedFunction, Mode=TwoWay,
UpdateSourceTrigger=PropertyChanged}"
VerticalAlignment="Center"
IsRequired="True"
Margin="17,0,0,0">


is it possible to capture some event in code behind file and can e achieve the expected results ?
any help would be much appretiated
Thanks

What I have tried:

what i have tried is to use the itemteplate and resource for combobox in a wpf xaml code but not be able to get the results.