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Q. No.Frog, when on land, uses which of the following as its respiratory organs?
| I: | The buccal cavity |
| II: | Skin |
| III: | Lungs |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Cockroach: Respiratory System |
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