Can an Option in a Select tag carry multiple values?

Answer 1

What about html data attributes? That's the easiest way. Reference from w3school

In your case

$('select').on('change', function() {
  alert('value a is:' + $("select option:selected").data('valuea') +
    '\nvalue b is:' + $("select option:selected").data('valueb')
  )
});