Match List I with List II. List I List II A Presence of air bladder which regulates buoyancy 1 Neophron B Mouth is located ventrally and skin has placoid scales 2 Hippocampus C Body is covered by dry and cornified skin, epidermal scales or scutes 3 Scoliodon D Long bones are hollow with air cavities 4 Chelone Choose the correct answer from the options given below:

Step-by-step solution

Presence of an air bladder which regulates buoyancy is a characteristic feature of Osteichthyes (bony fishes). Hippocampus (sea horse) belongs to this class. Thus, A matches with 2. A ventrally located mouth and skin with placoid scales are characteristic features of Chondrichthyes (cartilaginous fishes). Scoliodon (dog fish) belongs to this class. Thus, B matches with 3. Body covered by dry and cornified skin, epidermal scales or scutes is a characteristic feature of Reptilia. Chelone (turtle) belongs to this clas