Hi Sujay,

You can achieve this, for example using the ValueChanged client-side event of the second dropdown to iterate through its items and select these that match one of the pasted values:

function onValueChanged(sender, e) {
    //get the pasted values (works for separator ',')
    var values = e.getNewValue().split(',');
    for (var i = 0; i < sender.get_items().getLength(); i++) {
        for (var j = 0; j < values.length; j++) {
            var item = sender.get_items().getItem(i)
            if (item.get_text() == values[j]) {
                item.select();
            }
        }
    }
}

Let me know if this helps.