The correct answer is option (3), because • Carcharodon is a cartilaginous fish which belongs to the class Chondrichthyes. • Myxine is a jawless vertebrate that belongs to the class Cyclostomata. • Clarias is a bony fish which belongs to the class Osteichthyes. • Ichthyophis is a limbless animal which belongs to the class Amphibia. Hence the correct matches are A. Chondrichthyes - Carcharodon B. Cyclostomata - Myxine C. Osteichthyes - Clarias D. Amphibia - Ichthyophis