Class 11 Biology Animal Kingdom Phylum-Chordata

What do $a$ and $b$ represent in the given chart respectively?

A
Cephalochordata,Hemichordata
B
Urochordata,Cephalochordata
C
Urochordata,Invertebrata
D
Urochordata,Hemichordata

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Class 11 Questions

Class 11

Biology Questions

Chapter

Animal Kingdom

Subtopic

Phylum-Chordata

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