Male sterile plant differs from the self-incompatible plant in having:

Correct option is B

Male sterile plants cannot produce functional pollen, a key distinction from self-incompatible plants, which produce functional pollen but prevent self-fertilization.
Other Options:
· A: Fertile pollen: Opposite of male sterility.
· C: Sterile ovary: Related to female sterility, not male sterility.
· D: Fertile ovary: Both male-sterile and self-incompatible plants can have fertile ovaries.
Key Points:
· Male sterility is marked by non-functional pollen grains; the main cause is mutation.
· Cytoplasmic Male Sterility (CMS): Determined by cytoplasmic genes; progeny are male sterile due to maternal inheritance.
· Maintainer line (B line): Used to preserve the male sterile line (A line).