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a
Egg cells- Filiform apparatus
b
Water hyacinth- Pollinated by water
c
Formation of gametes in angiosperms- Sporogenesis
d
Self-incompatibility- Outbreeding device
answer is D.
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Detailed Solution
Outbreeding device promotes cross pollination. In self incompatibility the self pollen grains cannot germinate on the stigma of the same flower. Therefore, self fertilization is completely prevented.