To accurately match List I with List II, each item in List I must be correctly associated with a corresponding item in List II based on their biological classifications or characteristics:
A
Pleurobrachia
II
Ctenophora
B
Radula
I
Mollusca
C
Stomochord
IV
Hemichordata
D
Air bladder
III
Osteichthyes
Explanation of associations:
Pleurobrachia is classified under phylum Ctenophora. Hence, A corresponds to II.
Radula is a characteristic feature of phylum Mollusca, utilized for feeding. Therefore, B corresponds to I.
Stomochord is present within the phylum Hemichordata, forming part of the proboscis structure. Thus, C corresponds to IV.
Air bladder (swim bladder) is found in bony fish of the class Osteichthyes, aiding in buoyancy control. Consequently, D corresponds to III.