If I found a best answer is totally wrong, How can I report it?

It's not a violation for an answer to be wrong...if that were the case I think everyone here would have been banned by now.

The person chose a best answer or the community picked it and if it's wrong there isn't anything you can personally do about it.

You CAN'T!!!!

The reason for that, is how do you know if it is wrong.. it is just your opinion, just like the person who gave it obviously thinks that it is right.. Yahoo doesn't have the resources to check out these claims..

What you can do is add a comment under the question, saying what is the correct answer and why.

Depends on what you mean by "wrong". If it's merely factually incorrect then that's not a violation. If it actually violates the community guidelines then you simply click "report it". Like others have said I would just forget about it and move on.

Add your comments by clicking on the link at the end of the best answer. You can give your opinion and your reasoning in the space provided. If you need more than 300 characters to do this, click on the link, again.

You can't.

because Y!A does not evaluate or guarantee the accuracy of ANY answer, I could give the biggest lie of an answer ("Stages are made of cheese!") and if it gets Best Answer

You don't report it. It's done and over with. I'd suggest you just forget about it and move on.

Who going to liston to your choice not yahoo and person pick that answer.Yes i agree some of thoes answer shouldn,t been pick there were better answers to there questions.

Happens all the time - forget it & move on.

let it go