When you answer this question be sure to remain positive, even if the experience wasn't. Avoid talking about any previous drama and do not speak poorly of your colleagues.
If you had a good relationship with your previous colleagues: "I get along well with most personalities. My colleagues were great team players, and we would often meet up after work for drinks or team activities."
If you did not have a good relationship with your previous colleagues: "I have had better relationships in the past, but we did the best that we could. Our communication styles were all very different which made it challenging at times."