False memory syndrome refers to a person's identity and interpersonal relationship centered on the memory of a traumatic experience. This memory is objectively false, but the patient is convinced that it is very realistic in the patient's heart. Is almost an "objective reality". According to the above definition, which of the following is false memory syndromes? ['After being bitten by a snake, A will be scared when he sees everything like a snake.', "B participates in the wedding and can't help but recall the situation when he was married and feel happy.", 'Seeing the poor beggar on the side of the road will bring back painful memories and pity.', 'Ding can get the peace of mind by repeatedly washing hands to eliminate the strong filth inside.']