Q: Of the nine classes of vertebrates, how many are fish?


Read this paragraph and choose the correct option from the provided answers:

Of course. But what type? Of the nine classes of vertebrates, five are fish. Each of the five classes has distinguishing characteristics that allow members to be classified appropriately. Stingray are cartilaginous fish, related to sharks.

 Choices:

- one

- four

- three

- five


A:
five