Which two of the four characters are given below are the general characters of the phylum Mollusca?
i. Triploblastic, segmented and coelomate animals.
ii. Gills are present in the mantle cavity.
iii. Body is divided into proboscis, collar and trunk.
iv. Body is covered by a calcareous shell.
(i) is wrong because molluscs are unsegmented animals. (iii) is wrong; body is divided into proboscis, collar and trunk in hemichordates but not in molluscs.