Kindly solve the following:

Dear student,
Please find below the answer:

The correct option is (C).
Chordates have dorsal and hollow nerve cord. The other characteristics are:

• paired pharyngeal gill slits
• bilateral symmetry, triploblastic organization, and coelom​​​​​​
• organ system level of organisation.
• post anal tail
• closed circulatory system

Hope this clears your doubt.
Regards.