Which of the following statements are incorrect?
(i) Parapodia are lateral appendages in arthropods that are used for swimming.
(ii) Rasping mouth-like organ present in molluscs, are involved in excretion.
(iii) Animals of Aschelminthes are dioecious (separate male and female).
(iv) Echinoderms adults show radial symmetry.
(v) Ctenophores are diploblastic.

The correct option is A (i) and (ii)

• Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming.
• Animals of phylum Mollusca possess a mouth that contains a file-like rasping organ for feeding, called radula.
• In animals of phylum Aschelminthes, sexes are separate (dioecious) i.e., males and females are distinct.
• The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical.
• Ctenophores are diploblastic organisms with a tissue level of organization.