<strong> Option Array: </strong> 
<?php
$my_arr = get_custom_field('product_options');

$opts = array(
    'Option 1' => '<div>Option 1 description</div>',
    'Option 2' => '<div>Option 2 description</div>',
    'Option 3' => '<div>Option 3 description</div>',
);
 
foreach($my_arr as $val) {
if (in_array($val, array_keys($opts))) echo $val . "<br/>"; else echo 'nope<br/>';
} ?>