To Sololearn admin How can someone mark his response, to his questions, as best answer, I think you should revoke this option.

Question

ask a question and give an answer.

Answer 1

Hmm, you may suggest this, but as @Krishna has said, it won't earn the person any XP. Also, some people may use this to clip a post to the thread for informative purposes.

Answer 2

You can upvote/downvote/mark best your post but that won't give any XP and won't be considered for badges.