The correct answer is D. Hilum.
The hilum is a scar on the seed coat marking the point of attachment of the funicle, which is a stalk that connects the ovule to the placenta in the ovary. The hilum is also the point of entry for the radicle (root) and plumule (shoot) of the embryo as it emerges from the seed.
The nucellus is the female gametophyte of the seed plant, and it is located inside the ovule. The nucellus is a nutritive tissue that provides food for the developing embryo.
The chalaza is a thickened region at the base of the ovule. The chalaza is attached to the placenta, and it is the point of attachment of the funicle.
The raphe is a ridge that runs along the length of the ovule. The raphe is formed by the fusion of the two integuments of the ovule.