The correct option is D Corpus callosum
In mammals a large band of white matter, the corpus callosum connects the right and left hemispheres. It is a unique character of the mammalian brain. During embryonic development, the portion of the follicle that remains in the ovary develops into the corpus luteum, a temporary endocrine gland that secretes estrogen and progesterone. Corpus striatum is present in birds. A part of their cerebrum, the corpus striatum, is highly developed. This structure controls eating, flying, singing, and other action patterns. Corpus fibrosum is the fibrous structure in the ovary.