| Column-$I$ | Column-$II$ |
|---|---|
| $A$. Planula | $1$. Coelenterata |
| $B$. Tornaria | $2$. Hemichordata |
| $C$. Trochophore | $3$. Annelida |
| $D$. Bipinnaria | $4$. Echinodermata |
| $E$. Glochidium | $5$. Mollusca |
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| $1. \text{ Osculum}$ | $p. \text{ Fasciola}$ |
| $2. \text{ Hypostome}$ | $q. \text{ Ctenoplana}$ |
| $3. \text{ Comb jellies}$ | $r. \text{ Spongilla}$ |
| $4. \text{ Hook and sucker}$ | $s. \text{ Meandrina}$ |
| Column $X$ | Column $Y$ |
| $(1)$ Green gland | $(P)$ Mollusca |
| $(2)$ Digestive tract with digestive glands | $(Q)$ Arthropoda |
| $(3)$ Straight or coiled alimentary canal | $(R)$ Hemichordata |
| $(4)$ Straight or $U$-shaped digestive tract | $(S)$ Echinodermata |
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