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| Column-$I$ | Column-$II$ |
| $(A)$ Fish | $(i)$ Two atria and one ventricle |
| $(B)$ Frog | $(ii)$ One atrium and one ventricle |
| $(C)$ Snake | $(iii)$ Two atria and two ventricles |
| $(D)$ Ostrich | $(iv)$ Two atria and incompletely divided ventricle |
| Column $X$ | Column $Y$ |
| $(1)$ Platyhelminthes | $(P)$ Malpighian tubules |
| $(2)$ Aschelminthes | $(Q)$ Nephridia |
| $(3)$ Arthropoda | $(R)$ Flame cells |
| $(4)$ Annelida | $(S)$ Renette cells |
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