- The platypus (Ornithorhynchus anatinus), sometimes referred to as the duck-billed platypus, is a semiaquatic, egg-laying mammal endemic to eastern Australia.
- Kangaroo and koalas are marsupials that give birth to an underdeveloped foetus.
- Whereas, Porcupine does not lay eggs and is a viviparous mammal.
Hence, the correct answer is option B.