Unable to read Nintex Form dropdown control

We have migrated Nintex Form from SP 2010 to 2016. 

Below was the code to read selected value from dropdown in 2010 which is not working in Nintex 2016 forms

NWF$("#" + ddlCountry).find("option:selected").text()

We have used the below to fix in 2016. Do we have any other approach to read the dropdown value?

NWF$("#" + ddlProduct).parent().find('select.nf-client-control > option:selected').text();