The correct option is B Ovary
Corpus luteum is a temporary endocrine structure in female mammals, which is present in ovary that is involved in the production of hormones, such as progesterone and estrogen. The corpus luteum develops from an ovarian follicle during the luteal phase of the menstrual cycle, following the release of a secondary oocyte from the follicle during ovulation. The term corpus luteum refers to the visible collection of blood left after rupture of the follicle, that secretes progesterone.