The correct option is B Kangaroo, Hedgehog, Dolphin, Loris
Birds and mammals are animals adapted for the terrestrial mode of life. All birds lay eggs, both flight as well as nonflight like Kiwi, Penguin and Ostrich. Mammals are characterised by the presence of mammary gland and placenta. They produce young one and nourishes them through mammary gland e.g., kangaroo, hedgehog, lion, cat, bat, loris etc. Platypus is a primitive egg-laying mammal, dolphin and whale are young one producing or aquatic mammal. Thus, the correct answer is option B.