Trigger jQuery event (bPopup) on specific dropdown value selected

Trigger jQuery event (bPopup) on specific dropdown value selected

I am trying to trigger a popup to appear if and only if a given value is
selected from the list.
The value of the dropdown menu is determined by session data, as such the
dropdown can be any of the options available on page load.
I want a popup (I am using bPopup plugin) to appear if a specific
selection is set on page load.
My dropdown
This is the HTML/javascript as it appears in browser source:
<select
onchange="this.form.submit()"
name="country"
id="country_drop"
>
<option value="select">Please Select</option>
<option value="Afghanistan">Afghanistan</option>
<option value="Angola">Angola</option>
<option value="Argentina">Argentina</option>
</select>
This is the jquery I'm trying to use to generate the popup if the slection
is Angola on page load:
$(document).ready(function() {
if($("#country_drop").val()=="Angola");
{
$('#popup').bPopup({
opacity: 0.6,
modalClose: true
});
}
});
What is currently happening:
Page loads popup on page load irrespective of selection, 100% of the time.