Self-pollination is
Transfer of pollen grains from anthers to the stigma of the same flower
Transfer of pollen grains from anthers to the stigma of a flower borne on the same plant
Self-pollination is the transfer of pollen grains from the anther to the stigma of the same flower or another flower borne on the same plant. External agencies are not required for self-pollination. Examples: tomatoes, peanuts, green pepper, brinjal, etc.