Which one of the following is an egg-laying mammal ? A)Sloth B)Duck - billed platypus C)Kangaroo D)Bandicoot
Option B) The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
