Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?

Options

A. It is absent throughout life in humans from the very beginning
B. It is present throughout life in Amphioxus
C. It is present only in larval tail in Ascidians
D. It is replaced by a vertebral column in adult frog

Answer

A

Explanation

In human notochord is present in embryonic region and later replaced by vertebral column.