What could be the reason for a healthy plant failing to produce viable seeds?

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Inability to self-pollinateSterility in the male reproductive partsSterility in the female reproductive organsAny of the above causesNone of the above

Explanation

A healthy plant might not produce seeds due to several reproductive issues: self-incompatibility (where a plant cannot fertilize itself), male sterility (failure of pollen production), or female sterility (failure in ovule development). Among these, male sterility specifically prevents seed formation by eliminating viable pollen, making it a common cause for seed failure.