Statement I : Lower invertebrates like sponges, coelenterates, flatworms etc exchange O₂ with CO₂ by simple diffusion.
Statement II : Amphibians like frogs can respire through their most skin (cutaneous respiration) only.
- ABoth statements are correct
- BStatement I is correct & II is incorrect
- CStatement I is incorrect & II is correct
- DBoth statements are incorrect
✓ Correct answer: B
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