Identify the correct terms for the following analogy-based questions:
$(i)$ Porifera : Choanocytes :: Platyhelminthes : ....
$(ii)$ Chondrichthyes : Placoid scales :: Osteichthyes : ....
$(i)$ Porifera : Choanocytes :: Platyhelminthes : ....
$(ii)$ Chondrichthyes : Placoid scales :: Osteichthyes : ....
- A$(i)$ Flame cells,$(ii)$ Cycloid scales
- B$(i)$ Cnidoblasts,$(ii)$ Ctenoid scales
- C$(i)$ Nephridia,$(ii)$ Placoid scales
- D$(i)$ Choanocytes,$(ii)$ Ctenoid scales
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