Even if you believe you get along with everyone, the interviewer will not believe you so don't say that you do. I recommend thinking about a type of person that is a bad worker. Use that person as an example and then explain what you do to put effort into the troubled relationship.
The reason why it is acceptable to say you have a difficult time dealing with people like this is because everyone will have a hard time dealing with this type of person. So it doesn't make you look bad because you can't get along with this person, however, this is a good answer because it shows taking initiative to correct the relationship.
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