The lungs in frogs are

Compact spongy masses

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Thin-walled, elastic, hollow bags

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Thick-walled, nonelastic, hollow bags

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Thick-walled, nonelastic, solid masses

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Solution

The correct option is B Thin-walled, elastic, hollow bags
The frog's lungs are a pair of thin-walled sacs connected to the mouth through an opening called the glottis. The pair of lungs is elastic, hollow, pinkish, ovoid sacs lying on either side of an oesophagus.
So, the correct answer is option B.

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The lungs in frogs are

The correct option is B Thin-walled, elastic, hollow bagsThe frog's lungs are a pair of thin-walled sacs connected to the mouth through an opening called the glottis. The pair of lungs is elastic, hollow, pinkish, ovoid sacs lying on either side of an oesophagus.So, the correct answer is option B.