You can create an online quiz for using Survey Monkey. It is intended to be used for surveys, but it also works well as a quiz. The great thing about it, is that you can see the results of the quiz right after the students take it. You will able to see what percentage of the class chose each answer.
Here's an example of a quiz that I created: http://www.surveymonkey.com/s/PT33QRR
Here's the link to Survey Monkey: http://www.surveymonkey.com