Which oviparous animal feeds its young one with mother's milk after hatching?

Options

A. Kangaroo
B. Bat
C. Penguin
D. Duck billed platypus

Answer

To answer the question "Which oviparous animal feeds its young one with mother's milk after hatching?", we can follow these steps:

### Step 1: Understand the Terms
- **Oviparous**: Refers to animals that lay eggs, with embryos developing outside the mother's body.
- **Mammary glands**: These are glands in mammals that produce milk to feed their young.

### Step 2: Identify Oviparous Animals
- We need to identify animals that lay eggs and also have the ability to feed their young with milk.

### Step 3: Analyze the Options
- **Kangaroo**: This is a marsupial, which means it gives birth to underdeveloped young that continue to grow in a pouch. It does not lay eggs.
- **Bats**: Bats are mammals that give live birth, not oviparous.
- **Penguins**: Penguins are birds (not mammals) and lay eggs; they do not have mammary glands.
- **Duck-billed Platypus**: This is a unique mammal that lays eggs and has mammary glands to feed its young with milk after they hatch.

### Step 4: Conclusion
The only oviparous animal among the options that feeds its young with mother's milk after hatching is the **Duck-billed Platypus**.

### Final Answer
The correct answer is the **Duck-billed Platypus**.

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