Which one of following is a true fish?
Correct answer: D. Sea fish
- A. Cuttle fish
- B. Silver fish
- C. Jelly fish
- D. Sea fish
Explanation
True fish have a backbone (inner skeletal system of bones), gills they breathe through, & fins & a tail for propulsion. There is no organism labelled Sea fish. However, options A, B, and C can be eliminated since they all refer to False fish. Cuttlefish is a mollusk. Silverfish is an arthropod. C is wrong because A fish must have gills, fins, and vertebra which is all lacking in a jellyfish.
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