Junior 4-H Rabbit Knowledge Practice Exam

While B.O.S. could stand for the other options provided, the most commonly used and accepted meaning is "Best Opposite Sex", usually referring to dog shows. In such shows, male and female dogs are judged separately and the "Best Opposite Sex" is the dog that is deemed to be of the best quality out of the opposite gender. Therefore, although the other options may seem plausible, "Best Opposite Sex" is the most widely used and understood meaning of B.O.S.