In some chordates, the notochord is modified as the vertebral column. Such animals are called vertebrates. Which one of the following statements makes sense?

Options

A. It is present only in larval tail in ascidian
B. All vertebrates are chordates but all chordates are all chordates are vertebrates.
C. All vertebrates are chordates but all chordates are not vertebrates.
D. Chordates are not vertebrates and vertebrates are not chordates.

Answer

C

Explanation

Chordates are those animals that have rod-like notochord. Notochord is also present in vertebrates but in most adult vertbrates, the notochord is replaced by vertebrates. Thus, we can say that all vertebrates are chordates but all chordates are not vertebrates.