Check this fiddle. I have added a solution.
- Select the first set of inputs with option1, bind event on it.
- Get selected input element's value.
- Select the inputs with the common value and assign them as checked.
http://jsfiddle.net/n8CdM/751/
$('input[name="option1"]').on('click', function () {
var selection = $(this).val();
$('input[value="' + selection + '"]').attr('checked', true);
});