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The one with the most upvotes will be selected...

Does it mean if the person with the highest upvote didn't get the answer correctly will win or the person must get the answer and have the highest upvote

The person with the greatest amount of upvotes will be selected...

And must get the answer correct right?

Yes, obviously..

The correct answer how do u mean? I thought it's was most suitable which means alot of answer will b suitable and convenient cos we all have different views