Justifiable defense refers to a limited act against an unlawful trespasser in order to protect the state, public interest, personal, property and other rights of himself or others from ongoing unlawful infringement.
According to the above definition, which of the following belongs to justifiable defense?
A deliberately wants to kill B and suffers from no excuse. as soon as A sees B, he seduces B with insults and other ways to seduce him to do it first, and then A takes out a prepared kitchen knife to kill B