Select the correct option in respect of characteristics of each group.
$\begin{array}{ccc}\text{Cyclostomes}& \text{Chondrichthyes}& \text{Osteichthyes}\\ \left(i\right)\text{Suking mouth}& \text{Ventral mouth}& \text{Terminal mouth }\\ \left(ii\right)\text{Scales absent}& \text{Placoid scales}& \text{Cycloid/Ctenoid scales}\\ \left(iii\right)\text{Marine}& \text{Marine}& \text{Marine adn freshwater}\\ \left(iv\right)6-15\text{pairs of gills}& 5-7\text{pairs of gills without operculum}& 4\text{pairs of gills with operculum}\end{array}$

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