Given here is representation of the extent of global diversity of vertebrates. What groups do the portions represent
A. a- fishes, b-mammals, c-birds, d-retiles, e-amphibians
B. a-fishes, b-amphibians, c-mammals, d-birds, e-reptiles
C. a- mammals, b-birds, c-fishes, d-amphibians, e-reptiles
D. a-birds, b-reptiles, c-fishes, d-mammals, e-amphibians.