The correct option is D Platypus
∙ The term mammal is derived from the Latin word 'mammae' meaning breast. They possess mammary glands which produce milk to feed their young ones. Most mammals are viviparous, i.e., they give birth to young ones.
∙ Some mammals that possess mammary glands for feeding young ones are oviparous, i.e., they lay eggs. Platypus and spiny anteaters are example of oviparous mammals.