Pick the odd one out and justify your choice by giving reasons:
$(a)$ Moss,Fern,Pinus,Spirogyra.
$(b)$ Sea Cucumber,Octopus,Feather Star,Starfish.
$(a)$ Moss,Fern,Pinus,Spirogyra.
$(b)$ Sea Cucumber,Octopus,Feather Star,Starfish.
(A-D) $Pinus$ is the odd one out because it is a phanerogam (seed-bearing plant),whereas the others (Moss,Fern,and $Spirogyra$) are cryptogams (non-seed-bearing plants).
$(b)$ Octopus is the odd one out because it belongs to the phylum $Mollusca$,whereas the others (Sea Cucumber,Feather Star,and Starfish) belong to the phylum $Echinodermata$.
$(b)$ Octopus is the odd one out because it belongs to the phylum $Mollusca$,whereas the others (Sea Cucumber,Feather Star,and Starfish) belong to the phylum $Echinodermata$.
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