Name a sport where people get hit. A boxing B football C hockey
People can get hit in boxing, football, and hockey, so the answer would be "all of the above" if that choice is available. If you must choose one answer of the three, hockey would be the most correct. This would be because in hockey there is a statistic called a "hit" that refers to when one player pushes or checks another with a lot of force.
In boxing, each boxer is hit directly many times by the other boxer, but this action is referred to more often as "punching" or a "punch". In football, players tackle other players for the most part. A very strong or fierce tackle can sometimes be called a "hit", but this isn't always the case. So "all of the above" would be correct, but if you have to choose, hockey would be the most correct.
Baseball is also a sport where players get hit, because a player can be hit by a pitch.