What does male sterility refer to in plants?

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Lack of viable pollen grainsPresence of non-functional pollenInability of the anther to produce pollenAll of the above

Explanation

Male sterility is characterized by the absence of functional pollen grains, meaning the pollen cannot fertilize ovules. This condition does not necessarily imply sterile anthers or all listed factors.

What does male sterility refer to in plants? — Plant Breeding and Genetics | PakQuizHub