The correct option is C Same or genetically similar flower of the same or other plant.
Self pollination is the transfer of pollen from the anther to the stigma of the same flower. This is called Type I self pollination.
In Type II self-pollination, pollen is transferred from the anther of one flower to the stigma off another flower from the same plant.
Thus, the correct answer is option (C), 'Same or genetically similar flower of the same or other plant'.