Read the following statements:
i) Spider and mosquito possess compound eye
ii) Jelly fishes possess cnidoblasts but comb-jellies lack them.
iii) Aphids increase crop yield
iv) All animals having true coelom are characterized by the presence of bilateral symmetry usually , tube -within-tube body plan, presence of mesoderm and true segmentation
v) The animals of the phylum porifera have originated from colonial protozoans.
Which of the above statements are correct?