[Most cartilaginous fishes...] Which one of the following statements is stated incorrectly regarding cartilaginous fishes?

For Competitive Exams

Which one of the following statements is stated incorrectly regarding cartilaginous fishes?

Cartilaginous fishes have sense organs.

Most cartilaginous fishes have color vision.

Teeth-like placoid scales are found on the skin of cartilaginous fishes.

In cartilaginous fishes, gas exchange occurs in the gills.

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