Study the following and choose the incorrect combinations:
I. Phylum: Porifera, Special cells: Lasso cells, Example: Spongilla
II. Phylum: Cnidaria, Special cells: Stinging cells, Example: Hydra
III. Phylum: Ctenophora, Special cells: Choanocytes, Example: Pleurobrachia
IV. Phylum: Platyhelminthes, Special cells: Flame cells, Example: Fasciola
