Which of the following statements are true for the Phylum Chordata?...

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Which of the following statements are true for the Phylum Chordata?
\( \mathrm{P} \)
(A) In Urochordata, notochord extends from head
WV to tail and it is present throughout their life.
(B) In Vertebrata, notochord is present during the embryonic period only.
(C) Central nervous system is dorsal and hollow.
(D) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
(a) (D) and (C)
(b) (C) and (A)
(c) (A) and (B)
(d) (B) and (C)
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