The correct answer is (D) All the mentioned.

The types of computer networks include:

• LAN (Local Area Network): A network that is limited to a small geographic area like a building or campus.
• MAN (Metropolitan Area Network): A network that spans a larger geographic area, such as a city.
• WAN (Wide Area Network): A network that covers a vast geographic area, such as a country or even globally.

All of these are valid types of computer networks.