Question

Identify from the following a character that is exclusive to mammals.

• A. Warm-blooded condition
• B. Four-chambered heart
• C. Lungs as the respiratory organs
• D. Left aortic arch

Answer 1

The correct option is D Left aortic arch

Out of the given options, the left aortic arch is the only character that is only found in mammals only. Mammals and Aves both contain animals that are warm-blooded. Like mammals, crocodiles also have a four-chambered heart. Lungs are present in Mammals, Aves, and some reptiles.

So, the correct answer is 'Left aortic arch'.