Animals belonging to Phylum Chordata are fundamentally characterised by the presence of structures noted as A, B C and D. Identify them and select the correct option.

Options

A. A-Notochord, B-Nerve cord,
C-Gill slits, D-Post-anal part
B. A-Nerve cord, B-Notochord,
C-Gill slits, D-Post-anal part
C. A-Nerve cord, B-Notochord,
C-Post-anal part, D-Gill slits
D. A-Nerve cord, B-Gill slits,
C-Notochord, D-Post-anal part

Answer

B