​​name the class of chordata that has 
​a. placoid scales , powerful jaws, and internal fertilisation​​
​b. scutes, no external year and oviparous
c. operculum, air bladder and external fertilisation
​d. no neck, smooth skin with mucous glands

Dear Student,
 
Please find below the solution to the asked query:

Ans a. Class Chondrichthyes that includes cartilaginous fishes.
       b. Reptilia
​       c. Osteichthyes that includes ​bony fishes.
       d. Amphibia.
 
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  • 2
A. Chondrocthyes
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D.amphibia
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C. Osteichthyes
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B. Reptilia
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