How Make Filed Required depending on Drop down Selection

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Hi All,

We are doing personalization on Person Info page for Phone details where trying to make  filed Country Code required when user select Phone Type “Work Extension”.

We tried below #EL both are returning ‘false’ every time

#{bindings.PhoneType.inputValue=="Work Extension"}   or #{bindings.PhoneType.inputValue== ’Work Extension’}   

#{bindings.PhoneType.inputValue=="WE"}  or #{bindings.PhoneType.inputValue==’WE’} 

Please help us attached is the screenshot .

----Tarun