Question

Study the following and pick up the correct combinations:
 

Sl.No.	Classes	Features	Examples
I	Osteichthyes	Filamentous gills	Scoliodon
II	Amphibia	Sternum appeared first time	Ichthyophis
III	Reptiles	Temporal fossae	Bungarus
IV	Aves	Corpus callosum in brain	Corvus

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

Hint:

Amphibia first develop sternum; reptiles have temporal fossae. Birds (Aves) do not have corpus callosum — only mammals do.

Answer 1

The Correct Option is B

- I - Incorrect: {Scoliodon} is a cartilaginous fish (Chondrichthyes), not a bony fish (Osteichthyes). Also, filamentous gills is incorrect here.
- II - Correct: Sternum appears for the first time in amphibians. {Ichthyophis} is a limbless amphibian.
- III - Correct: Temporal fossae (skull depressions) are present in reptiles like {Bungarus}.
- IV - Incorrect: Corpus callosum is found only in mammals, not in birds like {Corvus}.