When the ovule is bent like a horseshoe, is known as

Answer: Option D

When the ovule is bent like a horseshoe, is known as Campylotropous.
campylotropous is a condition of Having the ovules and seeds so curved, or bent down upon themselves, that the ends of the embryo are brought close together.
Campylotropous ovule is a curved ovule with the micropyle almost touching the funiculus. It is bent upon itself like a horseshoe but an embryo is straight.