The respiratory organ of tadpole is:

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Skin

Lung

Gill

Air bladder

answer is C.

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Detailed Solution

Concept- Frogs can change into different species through metamorphosis. Tadpoles are the first stage of the life cycle, and they go through various stages of growth before becoming adult frogs.
Tadpoles resemble little fish with tails when they first emerge from the egg. It is able to breathe underwater thanks to its gills.
Tadpoles have tiny flaps on their outer gill that allow water to pass past them while drawing oxygen from the air. The tadpole spends several weeks developing while consuming aquatic plants and algae. The tadpole is still developing its lungs at this time so that when it develops into a frog, it will be able to breathe outside of the water.
Hence, the correct answer is option 3- Gill.

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