Biology · ANIMAL KINGDOM

Refer to Figure 4.24 shown on Page 50 of the text, depicting four representative mammalian species labeled as (a), (b), (c), and (d). Which of the following options correctly correlates the labeled figure with its scientific name and key biological feature?

1. *Balaenoptera* - Oviparous blue whale possessing air sacs connected to lungs.
2. *Pteropus* - Viviparous flying mammal possessing a chitinous exoskeleton.
3. *Macropus* - Oviparous marsupial adapted for swimming in aquatic habitats.
4. *Ornithorhynchus* - Oviparous mammal possessing milk-producing mammary glands.