How to send multiple value of select to MVC controller using Ajax.

Question

<select id="selSub" multiple="multiple">
    <option value="1">C#</option>
    <option value="2">Asp</option>
    <option value="3">Java</option>
    <option value="4">Python</option>
</select>

The user can select multiple values now how do i send it to controller?