A) Platyhelminthes and Annelids
B) Annelids and Nematoda
C) Cnidaria and Mollusca
D) Mollusca and Echinodermata
Correct Answer: A
Solution :
Flame cell or solenocyte or protonephridia and nepheridia are excretory organs of phylum platyhelminthes and annelida respectively.
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