Question

{"given":"The question asks to identify the correct statement about the reproductive structures of *Taenia* (tapeworm).","key_observation":"*Taenia* is a hermaphroditic organism, and its body segments, called proglottids, develop sequentially. Mature proglottids, located in the middle region of the strobila, contain both fully developed male and female reproductive organs.","option_analysis":[{"label":"(A)","text":"Male organs occur in posterior proglottids.","verdict":"incorrect","explanation":"Posterior proglottids are typically gravid, meaning they are filled with a uterus containing fertilized eggs, and their male reproductive organs are degenerated or absent."},{"label":"(B)","text":"Male organs occur in anterior proglottids.","verdict":"incorrect","explanation":"Anterior proglottids are immature and have undeveloped reproductive organs."},{"label":"(C)","text":"Female organs occur in anterior proglottids.","verdict":"incorrect","explanation":"Anterior proglottids are immature and have undeveloped reproductive organs."},{"label":"(D)","text":"Mature proglottids contain both male and female organs.","verdict":"correct","explanation":"Mature proglottids, located in the middle region of the strobila, are hermaphroditic and possess fully developed male and female reproductive organs, allowing for self-fertilization."}],"answer":"(D)","formula_steps":[]}