\[
\text{Claspers} \rightarrow \text{Cartilaginous fishes}
\]
\[
\text{Air bladder} \rightarrow \text{Bony fishes}
\]
\[
\text{Cleidoic eggs} \rightarrow \text{Reptiles}
\]
\[
\text{Amphiplatyan vertebrae} \rightarrow \text{Mammals}
\]
Thus,
\[
A-V,\quad B-I,\quad C-II,\quad D-III
\]
Hence option (D) is correct.