Question

Match the columns and select the correct option.

Name	Type
A. Skates	I. Osteichthyes
B. Hippocampus	II. Bony fish
C. Scoliodon	III. Elasmobranch
D. Protopterus	IV. Chondrichthyes

• A. A- III, B- I, C- IV, D- I
• B. A- I, B- III, C- IV, D- II
• C. A- II, B- III, C- IV, D- I
• D. A- II, B- IV, C- I, D- III

Answer 1

The correct option is A A- III, B- I, C- IV, D- I

Skates are cartilaginous fish belonging to the family Rajidai and subclass Elasmobranchii. They resemble true fishes in external form but differ from them widely in structure. They have no swim bladders and have 5-6 pair of gill clefts.
Hippocampus or seahorse has a head and neck suggestive of a horse. They also feature segmented bony armor leading to an upright posture and prehensile tail. These are bony fishes consisting of bony plates which are arranged in the form of rings. They lack scales.
Scoliodon is a genus of requiem shark and is thus a cartilaginous fish. The body tapers at both the ends. They have exoskeleton in the form of placoid scales.
The Protopterus is the African lungfish and is Osteichthyes. The body is elongated and cylindrical. These fishes have scales which are embedded in the body.

Thus, the correct answer is option A.