This is usually the best option, since it allows you to provide a tactful answer without sacrificing your rights. To answer the intent behind the question, try to figure out what the interviewer REALLY wants to know. For example, if the interviewer asks if you are a U.S. citizen (which is an illegal question), a smart answer would be, "If you mean to ask if I am legally authorized to work for you, the answer is yes." In cases like these, it's best to rephrase the question into a legal one and then answer it. This displays flexibility and composure -- strong job skills.