@ hazemmaxxx
You can see if an answer is right or wrong by the xp you recieve while answering. It's been said a lot of time already.
@ legend0091
It's already been said too. They said "Which is NOT an olympic water sport" but meant "Which of these water sport doen't belong to the same discipline" =P
But as you know, you shouldn't ask for much from them. they already copied all their questions from another website, don't think they would actually correct the faults.
Anyways, those don't belong to the same discipline:
Water polo, diving and swimming are led by the International Swimming Federation(FINA)and belong to the Aquatics.
Rowing is led by the International Rowing Federation (FIRA) and belongs to the Rowing. :P
For more info:
Olympic sports - Wikipedia, the free encyclopedia