The correct option is A Parapodia
The term parapodium refers to two different organs. In annelids, parapodia are paired, un-jointed lateral outgrowths that bear the chaetae. In several clades of sea snails and sea slugs, 'parapodium' refers to lateral fleshy protrusions. Parapodia functions in locomotion, gas exchange, protection, attachment, controlling water flow within a tube, or can be reduced or lost altogether. Cilia, flagella and pseudopodia are only locomotory organs of protozoa.