Which of the following does not have a four-chambered heart?

Sparrow

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Crocodile

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Cobra

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Cat

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Solution

The correct option is A Cobra
Among vertebrates, birds and mammals possess a four-chambered heart, e.g. sparrow, cat, humans, etc. All reptiles have a three-chambered heart with an exception of the crocodile which has a four-chambered heart. Since the cobra is a reptile, its heart is three-chambered. Therefore, the correct answer is option C.

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